as a user of them and not more of a hitscan savvy i think it's safe to say it has its appropriate times as much as projectile weapons.
whether you're going for realistic or something extremely powerful in a gamemode or a randomizer deathmatch, yeah. but you shouldn't put it in arcade-like gamemodes where projectiles would be necessary as an arcade-y fun unrealistic theme.
you get to be more careful and predict your shots a bit more with projectiles than you could at hitscan