It's kind of odd to me that we listen to famous actors' opinions on anything other than acting, instead of treating them like the average Joe they are when they speak about something that's not in their area of expertise.
Although I'm not really sure what the takeaway would be.
We humans have this sheepish herd mentality - when SHTF its often manifested in even the best and mentally most resilient of us. A great societal evolutionary advantage in the past for sure, but these days it messes up important stuff like politics and overall heading of society, since its trivial for skilled/talented people to abuse. Trump won that way, as did any other populist ever, this is reason why so many stupid movements like flat earthers exist.
All this boils down to us being mostly emotional rather than mostly rational beings. Emotions are easy to manipulate and change even on their own, do something dramatic and decades of hard facts are thrown out of window in an instant.
Back to why simpler folk so desperately cling to celebrities - we want to be told how to live, what to do, what to think. Figuring out life for oneself is massively harder very long task with no guarantee of success. And lets be honest, most folks don't end up very fulfilled nor happy, life has many tricks how to fuck you up even if you don't manage to do it yourself. Thats why and only why fashion is a thing, rationally it makes 0 sense. Thats why folks get addicted to sugary food that kills them while knowing it very well. We are not good at managing emotions, rather emotions manage us.
I try to actively fight all this, but its an uphill mental battle with parts of myself, and the more successful you are, the further you get from most other folks just drifting in their lives, effectively erasing a lot of common ground.