Unlikely. The incels would find something else to become unreasonably embittered about so they can continue directing their misplaced ire towards women.

Male pattern baldness progresses with age, so attempting to prevent it is affirming, if anything, a desire to appear younger than one actually is.

But male pattern baldness is a male trait. So to affirm, wouldn't it be more of this? Men getting their hair follicles removed to emphasise this male condition.

It doesn't really make any sense to say that preventing a natural feature of men from progressing is being done to affirm men.