why can't we just lower burst across the board? (Question)

Hey guys, seriously curious here.

Riot seems to be all about increasing bursts, where any carry can 100-0 any squishy in about 1 kit rotation after core build completion,

this isn't really that fun, fights have lost a lot of their macro edge.

gone are the long fights, gone are the various methods of macro fights.

Everything is down to a super low time window. Which isn't unfun, but it seems to me that it has become too widespread.

so why is damage up so heavy? Why are defensive abilities getting gutted and power being put into burst?

edit

i also would like to note that without any real variety of tanks, we have too much dominance on burst. We dont want that hellish tank meta, but hey Sustain damage is good against tanks and bad against burst which is what tanks were supposed to counter way back when.