ADC / Support Diversity?

http://champion.gg/statistics/#?sortBy=general.playPercent&order=descend&roleSort=

Top 5 pick rate are either ADC or support.

Top 2 ADC combined pick rate is 75%, with top 3 being 95%, Ttop 2 support combined pick rate is 62%, with top 3 being 86%.

Surprisingly I don't see anyone complaining about it, unlike other positions.

To compare: Top 11 top combined is 98%, with top 2 being 31% and top 3 being 42%. Top 7 mid combined is 94%, with top 2 being 36% and top 3 being 51%. Top 7 jungle combined is 95%, with top 2 being 39% and top 3 being 53%.

I understand that there is a bigger pool overall for the other positions compared to ADC and support, but even so, it shows that the situation for other positions are not worse off than ADC / support. Furthermore, ADC is a specialized role in which the champions can rarely fit on another role, unlike multiple champions who can either go top/jungle, top/mid, and thus inflating those pools. Support is less specialized, but the pool of champions who can go mid/sup is still not very big (did a quick count, 21 top/jungle, 16 top/mid, 5 top/mid/jungle, 10 sup/other, 2 ADC/other).

Edit: I didn't make this topic to complain actually, I just wanted to raise awareness since there are many "(champion) is killing (position) diversity!" topics but disproportionately few for ADC / support. I don't necessarily agree with them.