Like babies? (Well, most of the time.)
So I pretend there is free will, and therefore the same "product" can mean different things to me depending on what the creator tried to convey. To give a silly example, I somewhat liked the song "I kissed a girl", but now that I know a dude wrote it, I don't anymore. I would fully agree that this is totally arbitrary; but I don't tell others what to like, I just have my own reasons for (not) liking things. And when AI happens I will be convinced that humans partly made it to escape themselves and their responsibility, and so I'll be with the luddites, pouting :P
"What is true is already so.
Owning up to it doesn't make it worse.
Not being open about it doesn't make it go away.
And because it's true, it is what is there to be interacted with.
Anything untrue isn't there to be lived.
People can stand what is true,
for they are already enduring it."
—Eugene Gendlin
So in the meantime I accept that my desire to do or not do a lot of things is irrational which also implies I pretend there even is such a "thing" as "me", separate from everything else, for which there is no rational basis either. When you say "accept irrational beliefs", I think that presumes a baseline of pure rationality which I doubt any human ever achieved. So while I loved that quote and thank you for it, I also have to say that it might go both ways :)