scaling on true damage

to the devs,

why true damage have a scaling of some sort on all champs that have it? Those champs are already rewarded by having said true damage, if this damage can't be mitigated it doesn't need any type of scaling in my honest opinion.

i can undestand a stack mechanics ala Darius bleed. but i don't undestand why it should scale with ad as well. just remove the scaling on all true dmg and adjust the flat value to be a resonable amount. Cho gat can do up to 2k and more damage thank to his HP scaling and interation with stoneplate et similia. the simple fact the he already does up to 1000k without any scaling should be enough. since most squishies barely reach 2k hp. thank you.