You often are, or can become, who you compete against. Thus if you spent your time worrying about those beneath you, there’s a significant risk you’ll regress back to their level.
I try not to worry about amateur photographers undercutting rates or the endless drama they seem to always be drowning in. If my focus is there, it is not on bettering what I do or benefitting my clients.
Instead, I focus on competing with those I feel are actually better than me. It forces me to work harder, improve my craft and be smarter at what I do.
Taking on my toughest competition betters myself and what I offer my clients.