I don't ask about culture because even if I did, I wouldn't believe it unless I saw it. There is no incentive for people with bad culture to be truthful. And even then, I'd rather ask the people I'd be working with, not the HR department.
I do ask about the team I'll be working on, but that's basically it.
You're right that the 10 minute speech isn't enough. I'd even say it serves no value. Which is why it goes in one ear and out the other.
While I try to put on my fake HR face to hide it, I don't have interest. I'm a replaceable cog, and the company is a replaceable machine. But we all need money to live.
Tbh, if sounds like HR interviews want brown-nosing. Not in compliments or anything, but in asking the questions they expect you to ask, and faking your responses and enthusiasm to be just right to tickle their fancy.