Earlier quoted context omitted.
I feel like I am taking crazy pills. How does the word "ask" imply control? They can say no.
When your boss asks you to take a ticket, when a parent asks their son to clean their room, when a cop asks a citizen to identify themselves, you don't think those situations imply control? When a romantic partner asks you to change the drugs you are taking, don't you think there is some implication that their satisfaction with the relationship is contingent on it? Maybe we are getting too into the semantics here but…
This dude's girlfriends are free to tell him to fuck off (as one did) so there's no actual control.
There's a difference between "control" and "being on the same page about big deal stuff." I don't think my wife would marry me if I was a heavy drug user for example. That's not her controlling my life, it's her having a standard for herself. If we are not on the same page we just don't get married.
Presumably this dude doesn't want to date/marry someone who takes on heavy health risk when other options are available, especially when the nature of his can impact fertility and children. That's a very reasonable stance for him to take in his own life.