that is the leverage. I was referencing before you threw a fit that out of six examples (1 for each stat) you were prevented from playing a sorcerer from the culture randomly selected that fit dex. Most players would just take the +2cha one for a primary charisma based class or ask the gm if they could work something outIt doesn't give the GM any leverage. It just means that if your players want a better experience they're going to pick that culture regardless of anything else about it. As opposed to the thing we actually want, which is the players interacting in good faith with the world. I don't want players saying "x culture is more interesting, but I want to play a bard, so I either need to go argue with the GM to get the correct modifiers, or pick a culture I find less interesting and so am less likely to engage with."
I made the random example for an eberron game, most players are not extremely familiar with eberron & saying "these are the cultures in the area" helps guide all that working out so it's more likely to fit than "well no, that's a faerun location but here's something close except... no not really... so on & so forth". Put another way exactly the same as the AL rules that sometimes say what backgrounds are allowed for a hardcover. The backlash it generated from one person is frankly bizarrePersonally, I'd rather the player come up with the culture, and we can work out the backstory together of why that culture is good at sorcery or what have you.
But I like to encourage player ownership within the setting. Of course, I'm one of the unserious gamers who doesn't think NPCs are just in-utero PCs-to-be.![]()