Crypto casino wallet integration: why do some sites make this so complicated.

I keep running into crypto casinos that want like five different verifications just to get your wallet connected. Some of them are still stuck in the email-code-every-single-time era, and others need these weird wallet signatures or mini-deposits to prove you control it. Maybe there's a security reason, but it always feels like I'm setting up a bank account from scratch, not trying to spin some slots or put down a quick sports bet.

Is there any real logic behind this or is it just poor site design? Would love to hear if anyone knows a site that actually makes this smooth for crypto deposits and withdrawals.