As a BRD, you'll be competing for a spot. However, there are BRDs who don't want to multitask or do extra (T7, for example). As much as I try to retire BRD, it's kinda late for me to do that, as a lot of people know I can stay alive and kite while still contributing to the group. This is offset by my lack of me not being fluent with pushing damage output, but the job gets done.

If you stick with BRD, yes, you may feel like there are too many. But then you realize that some of them are new to the job, some only want to pew~pew, and some have a better weapon than you but you see they only have 4k HP, Hero's accessories, and die a lot lol...

I can't speak on SMN, but I DO know you may feel exclusive with it. Not sure how often a SMN is being asked for in content. I know SMNs make for excellent kiters in T7.