Though you disagree, and legally you may be correct. I think participating in the procedure is a straw man argument. I believe someone is more likely to get lightheaded by standing by without some task to keep them busy than they are by doing some task - like holding the woman's hand.
Nor would it break my heart to keep non-medical personnel out of delivery rooms and C sections. But good luck making that happen.
the mind-set has become, "it's my labor and delivery and I (we) can do whatever we like." I can't tell you the number of very angry (and threatening to sue)family members I had because I limited the number of observers in the C section room to 1 rather than admitting the whole family.
Damned if you do, damned if you don't.
That's why we had home births. If the doctor gave us a hard time, we could tell him to leave and if anyone fainted, then we'd have to sue ourselves.