Everyone knows that it's better to play who you're comfortable with rather than playing a role you don't know just to fill. However, what if you don't have a main?

I came from Overwatch when there was no role queue so I would here so many people scream "We need a healer/tank!" Because of this, when I started Valorant I decided to focus on getting to know and be somewhat good at using every agent to play flex, but now after seeing so many people say "Play who you're comfortable with." I've been thinking should I leave this fill playstyle and pick up a main?