I've snipped the specifics you gave because I wanted to assert an even broader statement, including but not limited to what you referred to. My conclusion was

I've snipped the specifics you gave because I wanted to assert an even broader statement, including but not limited to what you referred to. My conclusion was probably not clear. I claim that if F-Droid allowed devs to submit their own APKs, it would open the gates to crapware authors providing a link to an apparently innocent github repo and then submitting APKs full of spyware, ads, crypto miners... I.e. the kind of crap you find in the Play Store.