I don't recall ever using the term "uptight" at any point, nor was I criticizing other ways to play the game. I'm well aware that the way my group plays is not for everyone. The point, which I guess you missed while frantically typing this defensive screed, was that it's okay to just have fun and not worry so much about imbalance. It's a game, not a full contact team sport. Not everyone has to produce equal results in every round, and not everyone has to fret about their DPR.
If you want to come off as moderate, probably shouldn’t refer to someone else’s points as “screed”.
Furthermore, the people who don’t care about balance shouldn’t care about people who do work for it, since they can evidently have fun either way, it’s a non-issue to you and yours regardless of how others react to it.
Much of the reason there is frustration with this is because of people spouting your mantra of “just have fun” without realizing that it’s not something people are able to control on a whim, and that their complaints may be entirely legitimate. There were many complaints of caster supremacy back in the 3.5 days and “just don’t think about it” is as useless and insulting now as it was then.
Lastly, yeah, actually, it is a team game. (and a contact one too, at least for the characters). So seeing your character have no point or no value to the team certainly does affect people’s enjoyment therein.
Is there anything this extreme in 5e? Thankfully no, at least in my experience, but having heard many of these “just don’t care” or “the DM can fix it” claims in the past, I find them an unsuitable defense for bad game design.