they're also capable of learning it themselves.
you're already leaping to the convictions...but a lot has to happen between the initial contact with a police officer and a conviction. Including, in the case of a booking/arrest, being read your Rights and given privileges while in custody.
Many of those with intellectual disabilities would obviously struggle to learn their constitutional rights on their own, especially if they've never even been told they need to. And once again you're making people's freedom more dependent on their resources than it needs to be - why would you do that?
Also, why require the reading of rights in booking but not during the initial arrest, when many of the violations of rights occur between arrest and booking?
I'm kind of flabbergasted why you're fighting to add more inequality to the system while, so far as I can tell, gaining literally nothing positive in return.