They don't know they can ask for one nor that police can deliberate and legally lie and misguide them into what their rights are. It's also kinda pointless for some people, some black guy a year or 2 ago made it to the news after he got arrested on bs charges and asked for a lawyer, and was denied it with the ruling of the judge saying that because of the way he asked to "just get me a lawyer, dog" didn't make it clear that he really wanted a lawyer.