So programs can read machine-id. If programs can read it they can transmit it.

Never said things can't read it (in fact, that's very intentional). I even linked you the man page that lays all that out for you. I'm saying your claim that things are transmitting it is baseless. You stated your speculation as fact.

Further, programs reading machine-id don’t necessarily fall into the spyware category by default like you say

If anything is transmitting this ID it should be considered spyware.

Whatever, I'm just repeating the same thing over and over again as if your reading comprehension will somehow get better.