We had fighter kits forever ago, couldn’t we have social kits?
Or you know how in 5e there is backgrounds? Maybe a similar system like the kits, but for social skills and crafting skills that are backgrounds?
Ive seen this done on other servers and it seems a reasonable approach, that way your fighter can get a boost in bluff or persuade, and a bard or rogue might be tempted to go for a different background.
The argument that 'it doesnt affect the mechanics of the game' is frankly bs, as DMs can and do check the levels of skills and attributes, and quests in the past certainly, have rewarded people with high persuade with more £££.