These things are multifaceted.
Someone might want to be able to video-call with their grandma who only knows how to use facetime, while also wanting to be able to compile and run open-source apps from source on the device they paid money for.
It's also not particularly well known either that apple has such predatory practices I don't think.
Of my friends, I don't think any of them realized the reason they couldn't buy ebooks on the iOS kindle app, and the app couldn't even have a link to the webpage where you could buy it, is Apple's anti-competitive rules to give apple books an edge. I think everyone just assumed Amazon was too dumb to design a "buy now" link.
I don't think most of my friends realize uBlock origin not existing for "chrome on iOS" is apple's fault, but rather assume the addon developer or chrome folks are at fault.