Click-use is a real thing! Developers try to limit when possible. Have a friend in the industry. Also, many of us BG fans are now 40’s or older. Our jobs require clicking too. That’s before even considering an 80+ hour mouse and keyboard game.
I use custom keybinds to move right hand clicks to the left hand.
BG3 is easy because it’s based on 5E, the easiest version of DND to date, and a system I’m well experienced in. It’s all about tactical positioning, order of actions and maximizing value of actions. I also play Panzer Corps, which is based around these aspects too.
I blew through the EA first go. The blighted village ambush and redcaps wrecked me, but nothing the retreat mechanic couldn’t fix. I’ve had harder times since trying new approaches to encounters.