The problem is that most normal people (HN is not normal - mostly for the better) don't even understand what sideloading is - let alone actually care.
How can we fix this?
(aside from making people care - apathy enables so many political problems in the current age, but it's such a huge problem that this definitely isn't going to be the impetus to fix it)
Weird apps that block your phone and show ads constantly (yes this exists)
Typosquatting apps
Apps that hold your phone for ransom if you don't pay a certain debt (yes this exists) https://www.welivesecurity.com/en/eset-research/beware-preda...