This might be naive, but it bugs me that protocol ports are visible to intermediaries. HTTPS encrypts the URL path. Why don't TCP and UPD encrypt (or otherwise

This might be naive, but it bugs me that protocol ports are visible to intermediaries. HTTPS encrypts the URL path. Why don't TCP and UPD encrypt (or otherwise scramble) their port numbers? (Yes, I know, those protocols don't include cryptographic provisions. Maybe they should be updated?)