Why do people que as fill/support second choice?
If they aren't a support main?
I'm not being sarcastic and complaining about how lopsided the matching is here, I'm just legitimately curious. You know that support is in higher demand than other roles, and there is no incentive to play it other than shorter que time, so if you don't want to primarily play support (ie more than 50% of your games) why would you put support or fill in as one of the choices you make for what role to que for? Why keep doing it if you aren't committing to being a support main (but you know you will get it more than your "main" role), and why list it second if you're a support main and not playing it as an off role?