There are lots of experiences that feel "delicious," but that doesn't make it moral to rip that experience for yourself out of the flesh of a sentient being. Maybe you consider cephalopods potentially sentient or maybe you don't, but the argument is "It's immoral to eat them because they can have thoughts and an internal experience, just like us," and "But they taste good" is not a counterargument.
> and millions of other people
That is also not any kind of an ethical defense of one's behavior.
> don’t feel any affection towards these cephalopods makes the argument of “farming octopuses is unethical […]” less agreeable.
One thing about logical reasoning - it doesn't really matter how "agreeable" its conclusion feels.