Yeah, it'd be terrible, awful, horrible if we could run the software we want on the computers we purchase. I've been installing software on WIndows without an infection since 2002, probably before you were born and I've been using third party Android app sources for various projects and products for a full decade without a single unwanted malware like behavior other than obnoxious notification spam. Yeah, tell me how much danger I'm in from my Windows and Android software, child.