"You can send money directly! *"
* If you have a pre-established out-of-band trust relationship and dispute resolution system with the person you're sending it to.
Which basically means you can send money to friends and family and that's about it. But you can also do that with Venmo or CashApp. Any online transaction among strangers that uses Zelle is 100% a scam. Full stop. There's a reason that groups that sell things plaster in giant bold letters to use PayPal G&S.
By far the biggest value-adds of Zelle existing is making it really obvious who the scammers are.