I don't necessarily agree with your reasoning; however, it looks like one's right to counsel is restricted if one is not charged with a crime:
https://supreme.justia.com/cases/federal/us/352/330/ (1957)
Further, it seems that Miranda only applies to custodial interrogations.
https://supreme.justia.com/cases/federal/us/384/436/ (1966)
I do think that if one is charged or restrained that the process might work. Of course, that's a pretty big escalation!