I've seen some discussion of Friends here. From EA, yes, it does have the -10 adjustment, and this does lead to conflict, but not necessarily violence. You have the opportunity to pass another check in order to avoid conflict, and you can use Friends again to win this check. Kind of like doubling down on the Enchantment. The only NPC I've had to kill without reloading was the dog. I used Friends to Intimidate it to come back to camp, and when I rested at camp, the negative reaction caused the dog to become hostile.
So with my build of +2 Charisma bonus, +2 Proficiency, Friends, Guidance 1d4, you will on average (I haven't worked probability in a minute, but I'm going by 2D20 choose best is 13 average, +4 CHR/proficiency, +2.5 Guidance) make 19. Add Karmic Dice (which they might adjust) and an inspiration point for must hit rolls, and suddenly your character is reliably passing DC 15 checks.
That is, High Elves, in addition to their other bonuses, have the ability to reliably pass Act 1 CHR checks provided they have proficiency and choose Friends. I haven't done the real math on it, but from my estimates with EA, High elf noble with 14 CHR and Friends can reliably (8/10 or 9/10) pass every proficient CHR DC 15 check in Act 1, with about a 50% shot of passing DC 20. Then, you can use inspiration points if you fail to turn that into a solid 9/10 without reloading. Now, I'm not going to increase CHR from ASI for my character, so the PC may not be successful in future acts if they do amp up the DC. But it does work for Act 1.