It should be the responsibility of citizens to learn and understand their due process rights not for law enforcement to have to tell every criminal how not to incriminate themselves.
If someone can’t go on google and read the 5th-8th amendments before going out and doing some dumb and illegal shit then they deserve to be clueless thinking they have to answer questions during interrogation and be dead in the water when their trial comes.
Its easy to search “Do Americans have the right to a lawyer” on google.
TLDR: Knowing and understanding your rights should be the responsibility of citizens not cops.
The problem here is that you are working with an extremely tiny set of what you believe to be knowledge.
And your opinions flow from that.
You are probably unaware that police started as private forces meant to beat the living shit out of people who were protesting unfair labor conditions and the poverty that flowed from extreme concentration of wealth among few capitalists.
You probably don’t know anything. You probably don’t even know that slavery is related to how the justice system functions.
So it’s time to shut up and go learn.