Take that to the logical conclusion, and no one can date anyone else because there's always some power imbalance. Oh, you're on track to graduate with a BS in 4 years? Sorry, it's unethical to date someone that's changed their major twice.
Given that I work and my wife does not, oh no!, I have too much power in the relationship because I'm the only one bringing in money!, so she can never consent to anything! Which kinda eliminates her autonomy.
By abuse of power, I mean someone that has a degree of power or authority over another person, such as a supervisor at work, a professor with one of their students, a cop (seriously, no one should ever date a cop, hard stop), a mentor and an intern, and so on. A 30yo that goes to the same gym as a 18yo has no power over that 18yo, and no direct way to coerce them into a relationship.