Bonus gifting: why can't you send bonuses to friends?

Seems weird how you can share crypto or regular cash with people instantly, but you can’t just gift someone your casino bonus, especially since some promos just sit there unused if they don’t fit your play style. Like, say my buddy is really into blackjack and I’ve got a blackjack free bet bonus I’ll never use. Why not let me hand it off to him, especially since it probably expires soon anyway?

Anyone else think they just don’t want us optimizing the promos as a group? Or maybe there’s some sneaky reason involving anti-fraud stuff, but if it’s all crypto based, that’s all traceable. I keep picturing a much more social system if this sort of gifting was allowed, especially for regulars or club members.