Why everything need a %damage ability or insane base and scale damage at the same time?

Whats up with that? I started playing the week Rek'Sai was introduced into the game,she was balanced.4-5 years later i see more and more champions with either %hp damage or over the top base and scale damage.

Executes,i consider them somewhat the same as % damage [Reworked R] Im not going to mention ...

And because of all this damage going around they release which in my opinion is a great support,i loved playing him but his shields and heals and cc is just too much,understandable considering how much damage there is in the game..

And no,its not the "meta picks" this shit has been going around for more than 2 years now.its not just a "phase"