I haven't played DnD much, so take what I say with a grain of salt. I have lots to learn in BG3.
I just finished playing a jrpg called Yakuza: Like a Dragon. Excellent game. Like most JRPGs, there's not much role playing though. You're playing a pre-designed character that you can add a little flavor to. The games also focus on combat. Usually, there are few ways to avoid it and if you do, you're likely to not get much in the way of experience. So, growing your character to maximize your damage and defense potential is a big focus in the game. All this being said, while I usually opt to make a highly competent character, if I compare the damage I do at the end of the game to the stats of folks who maximize, I'm not even in the running. I may do 1/2 to 2/3 of the damage they are doing. My focus has always been on story. So I develop the character to be strongly competent in his/her role, but not to the point of letting the story bog down.
The other difference is that jrpgs have the grind mindset. So if you end up weak, they expect you to grind your way to more money, skills, HP, MP, etc. I don't enjoy the grind. I will do it the minimum that I have to in order to move the story forward without getting turned into a grease spot.
To me, as a newb to DnD, it appears that there's no grind mentality plus there are limited moments and ways that you can grow your character. Small decisions seem to have big consequences. If you choose poorly, you could end up with a character(s) that are non-viable in a world that is combat heavy. You have to live (or die) by your choices. So if there are few ways to solve encounters without resorting to violence, AND you can't correct your character development choices with a grind (due to level caps and no random battles), AND you have few moments that you are given an option to modify your character's stats, then in my mind, you'll see more focus/fixation by players on min/maxing.
All this being said, I expect I'll learn the rules for BG3 and develop my character similarly to how I do jrpgs. I want to build a nicely competent character, but I feel no need to maximize my battle prowess. I just want to be good enough that battles aren't too frustrating or impossible for me to survive and I want enough ability to get along with people that I can at least on some occasions, talk my way out of a fight. I guess I'm a "middle road" kind of person, so I build "middle road" kind of characters.
