Because...shocking fact... teachers need to be VERY charismatic to actually make children listen and learn from them... Adults tend to be even worse
Ummm, no. I come from a family of teachers. You don't need to be a Churchill, Gandhi or JFK to educate people.
That said, Charisma undoubtedly
helps, and as I said earlier, I'd have no problem with the effectiveness of training scale with charisma as well as skill. On the other hand, these are slaves, I should be able to train them 7 days a week if I want to. They may sit at the back of the class, blow bubblegum and pass notes, but I should damn well be able to make them attend.
You can train the Stat, for the Trait you can't really train... and there are more checks for the trait than the Stat
OK. What is this "trait?" It's the first I've heard of it.
Playing as a Mage is meant to make you tackle Dungens alone or with a little Group since MC packs a punch
Not in my experience. Try and clear a dungeon solo as a starting mage and you'll get your ass handed to you. That was true even before mav started systematically nerfing mage builds.
Having high Cha doesn't necessarily require being a prostitute.
No, but it is a highly efficient way to play. Set everyone as whores, player included and hit dungeons when you're feeling up to it, or keep adding slaves and clear the debt by working.
Used to be you could the same with a mage build, by having player fish and take advantage of the high Int, but that's no longer an option. To be a decent mage you need high Int and Mag and if you max out Charsima for the slave interactions then you have to compromise one of those, or settle for playing a politican who dabbles a bit in magic in his spare time. Which is great if that's the character you want to play ...
Unless you only raise Cha and Sex I guess.
I do tend to build them with two maxed out characteristics. There's a bonus for hitting max, and it's really expensive to get there in game time, while it's fairly cheap to raise 1 -> 3. So it's good strategy to my mind.
But I've played mages with Cha (fishing or cooking) and currently have a Phys+Cha with warrior classes+trainer who hunts or does upgrades in downtime since I don't have many workers yet. About the only thing you can't really do is start off as a competent fighter-mage AND have Cha but otherwise it seems okay. (Unless I've misunderstood the issue, I'm half asleep today.)
Thing is, if I max out Char, then I have, at best, low-medium stats in int and magic, and my best early game combatant (me) turns into a liability, while my best non-combat income stream is nerfed due to low int.