"10 minutes to come up with something amazing"
It's impossible to think of something amazing in 10 minutes.
"We aren't rich because we have cheap ideas, or can develop easily, we are rich because we have friends and support. "
This is conflicting to the title of the article and in any message attempted to be addressed.
"We will never succeed with selfless promotion, so don't do it!"
Who said a startup is about self promotion? If you are doing a startup for that, you are doing it already for a wrong reason. Of course you can be proud but the difficulties will really keep you rather silent and in need for focus on the real issues.
"Build something fun, not serious at all, that has no tool or function that people can use."
the world would be a big Disneyland if everything built is not serious, fun and had no function whatsoever!
"But if you have something great, make it sound like it's for the masses."
what do you consider great? and since when great things are targeted for the masses. Probably the best "toys" are exclusive to those with more money.
"Otherwise, if you have no crazy educational background, awards, job positions at big companies, nobody takes you seriously."
Again, expecting approval is the wrong way to go. Feedback is good, but if you are in need of approval to go after something, it's probably because you are not ready yet (lack of desire, lack of expertise or belief in your abilities etc).
"Development is pretty easy as well"
since when? If you are not building something new yes it probably is. But then you'll probably wont be a startup.
Also, the article began saying he will not share experience and the article is full of "advice" derived from personal experience, which may not complete yet, therefore there will be wrong conclusions that are not helpful for most. The only thing I somewhat agree is:
"Don't go out to places like Hackernews, TechCrunch, Mashable, etc hoping to pitch your idea."
Of course you should know your audience and what you are building.
If ideas were cheap and everyone was able to think of something "amazing" the article wouldn't be full of confusion.
"This isn't an article about my experience"
There are many other mistakes. But to conclude I'll just say that the author began saying that it's not about his experience when the whole article is based on them, from which someone can see that these are current/already expired point of views which will change accordingly if more experience is gained.
Yes, ideas are cheap judging from the whole article. Otherwise, the article would be filled with correct ideas.
Continuing flow of ideas and execution is what is hard.