I have no issues with browsers specifically having to use a bunch of resources. They are complicated as fuck software, basically it's own operating system. Same for video games or programs that do heavy data processing.

The issue is with applications that have no business being entitled to large amount of resources. A chat app is a program that runs in the background most of the time and is used to sporadic communication. Same for music players etc. We had these sorts of things since the 90's, where high end consumer PCs hat 16mb RAM.