That's a guarantee you can't back up.
Oh, and I do care about players getting better. You are even stupider than I thought if you honestly think you can dictate what I care about or how I feel.
Why would I not care about other players getting better at a multiplayer game that has a lot of content centered around team play?
They're random strangers, it's really not much of your concern. do you care about the job productivity of passing people you meet on the street? If you see some kids playing basketball, is it a concern of yours how seriously they're taking the game? I say let people do what they want, and focus instead on the progress of yourself and those you know. If someone applies for your guild for a raid spot, then and only then does their progress become your business.