Well, not really. The point is that mentality is applicable to a variety of things and can carry over to your real life. It’s probably not out of line to assume someone who gives up quickly in one area will do so in another.
What trinket…? I don’t know what about SL was shorter or whatever but either way yeah I mean, if it’s not fun then don’t play it for sure. Arena being fun is the ONLY reason I play it. That’s why even if rating is stagnant and there’s no inflation, I still enjoy queueing. The push is fun but so is the method. For me anyway. If this person just wants the mog and doesn’t like pvp much then I could see this being annoying. But that’s why no matter what is accessible in pve, I simply don’t play it. (Except that fire moonkin form… got that sh__ 
). They could easily just wait later in the season and get it super easily.