its especially bot lane because bot lane is the worst lane to lose in since there are two people with their own bounties of 300 gold that doesn't drop just because someone else died and if fed enough not even something like nasus wither can stop them I know because i have dealt with that every time i play nasus i'll build tons of armor to face my own lane end up with 300-400 Stacks by 20 minutes about 70% of the time and even with upwards of 200 armor and 400 stacks they get withered hit by one Q and by that point they have I.E. PD and Last wisper so my armor means nothing and they crit me into oblivion.
mid laners die because assassins and burst mages own that lane and in order for them to even exist they have to own that lane and since their job press delete all over your face its not hard to die to someone like LB,Annie,Fizz,talon,zed,and who ever else owns it the only exceptions im aware of are champions like chogath who do the same damage but are stupidly hard to drop.
top laners die because that is literally how it goes in top lane most of the time generally one jungler shows to gank or someone makes one small mistake and the enemy snowballs off the kill. good examples of this are champions like renekton whos job is to make you worthless for the next 20 minutes or champions like garen,darius,and riven who snowball off of one kill to the point they can solo carry the game.
and the basis of this post was telling people to just stay under their tower when you have a late game team not so much blaming bot lane exclusively tho they are the majority of the problem in the game when it comes to feeding hard since top laners usually know they lose the lane if they die and mid laners have less room to secure the kill + they are late game champions most of the time.