This is because casinos run many different kinds of games (both in the poker room and elsewhere). They also are regularly raking standard amounts for the house,

This is because casinos run many different kinds of games (both in the poker room and elsewhere). They also are regularly raking standard amounts for the house, and for promotions, not to mention dealers taking tips. Few of the above needs apply to casual unraked homes game, unless you are playing limit as noted. (I’ve never encountered a limit home game; more and more these are strictly hold ’em or PLO/PLO8, unless the players are over 70. Once in a while if it gets really late and shorthanded someone might suggest a round of stud, I guess) And even then you need larger numbers of fewer types of chips for limit, as a rule.