Thresh crowding out supports?

I was just looking at support stats for plat + players and it is a little surprising that thresh is the highest winrate support, which is fine because he does take a good amount of skillz to fully utilize his kit. Then again he also is getting picked at twice the rate of even the second highest pick support ( ), and he 'catches' a 30% pickrate. Is it right to have the most picked support( ) also doing better than every other support on average? It would seem that good Thresh players are outperforming other good support players more times than not and with a larger sample size. Actually, there are very few situations where picking thresh would be a bad choice since he can be played defensively and also cause picks for his team and the only limit would be the player behind the keys as to how effectively he can perform both. I personally would like to see more support diversity since one of either followed by and , seem to be almost in every game.