Because Honour mode mimics a real campaign. It's not about self control, it's because your DM rolls with your decisions.
It mimics a real campaign with a very sadistic DM. You need to do a lot of metagaming to complete the game on a higher difficulty, and that goes against the spirit of roleplaying.
ps. still the most notable absence for me compared to BG1/2 is the complete lack of a shorty companion.
Yeah, that's kinda weird, but not surprising if you look at the list of companions you get: sexy elf girl, sexy elf dude, sexy white guy, sexy black guy, sexy thiefling girl, sexy alien girl, sexy big elf dude and sexy drow mistress. It's clear that an old unf***able dwarf would look out of place on this list. BG3 companions are there to be romance options for the player. That is their primary role. Apparently they all join the player just to have sex with him/her, as evidenced by the fact that all of them will hit on the player at some point. I am not a prude by a long shot, but the amount of horniness in this game is jarring.
