You didn't respond to my other questions. What are they supposed to do and eat, then? What about what you said makes them unintelligent?
Edit: Replying to the reply I received here in an edit, since the comment is now dead.
I apologize for being confused, because I indeed was. I wasn't trying to do anything other than understand you're admittedly confusing argument, which is why I asked for an elaboration.
> Can you please point me to cultural, scientific, technological, architectural, philosophical achievements of orcas that are typically associated with human-level intellect?
Now we're getting somewhere interesting. :) None of those things, aside from maybe culture have anything to do with intelligence. Orcas certainly do have culture and do more than just eat. They stay with their families their entire lives, intelligently breading with other pods (i.e., not their relatives), have play, vocalization and by all appearances language, and even recreation, such as vising massaging pebbles or visiting their favorite areas. The have culture, such as play activities and hunting techniques, that are passed done from generation to generation and are activity taught to fellow pod members. There is even a famous example of orcas teaching and training humans to hunt whales in a mutually beneficial way that allowed the orcas to eat their favorite parts: the tongue.
An orca's brain is fascinating. It is much larger than a humans. Of course, their bodies are much larger and thus need more processing power to handle the larger system, but the brain size is certainly a component to their intelligence. What's more interesting is that their brain exhibits much higher density and complex folding than our brain does. Folds in brains increase surface area and are thought to correlate strongly with more processing power and higher intelligence. We are smoothed brain compared to them. Another fascinating thing about their brain is that the part of the brain associated with emotional intelligence in much larger than humans and other primates relative to the rest of the brain. So it stands to reason by both brain structure and their behavior that orcas are much more emotionally intelligent than humans. As a separate fact, orcas are one of only three mammals, the other being pilot whales and humans, that undergo menopause, an evolutionary adaptation that helps allow their matriarchical society to maintain its social structure and health.
Science is absolutely clear on this fact: orca brains have every indication of processing power that competes very seriously with human brains and in some ways out competes it. And with every bit of new research that comes out, we find out more that points in the positive direction of them being even more intelligent than we thought. Compared to ancient humans prior to agriculture and technology, their hunting techniques absolutely equal human techniques. It's possible that they are even more coordinated than humans.
Regarding the rest of the stuff you mentioned such as scientific, technological, architectural, philosophical achievements, none of these things matter for or hardly even relate to intelligence. For one, we have no understanding nor comprehension of their internal mental models and thus cannot comment on their philosophy.
For the rest, I would ask you to consider their environment. They live in the ocean and are forced to live near the surface due to being air-breathing mammals. Not even considering the fact that they lack hands and opposable thumbs, their environment makes technological progress impossible. There is no way to develop writing or printing technology, agriculture, architecture, or anything else due to their aquatic environment. As a thought experiment, take humans and give them the magically ability to live in the ocean permanently with the typical human dexterity, hands, and opposable thumbs. Writing, printing, recording of any kind would be impossible for ancient humans to obtain, thus preventing all technological development.
Lastly, one should consider what intelligence actually is. Orcas live their lives by eating responsibly and healthily, stay with their families, play, communicate, and live all without waging war. We humans live our lives slaved to our technology and socioeconomic systems with vast amounts of self-induced mental and physical health problems while trying to obtain some misplaced notion of permanence in this universe through AI or space travel, all while completely destroying the environment for ourselves and every other species. Humans are also some of the most if not the most violent species to ever exist. Which is more intelligent?