It's frustrating and not fun to just run into encounters you can't complete after a few tries. To me, min/max means pure optimization. That should not be needed to get through content. But wanting to have sensical builds is probably a good idea. A Great Axe using Barbarian with a STR of 10 is probably not a great idea and if you build a whole team with similar decisions that and you could very much struggle.
So it's nice to tell someone it's your game, play how you want. And then they quit after 15 hours because they are stuck and have awful builds, I am not sure that was the best advice.
So you shouldn't need to truly min max and worry about being absolutely perfect, but I'd recommend everyone understand mechanics enough so that they make decent decisions on stats and builds so they can make it though the game.
