I certainly agree that the concept of a woman being too muscular does not have any basis in medical or exercise science. But if you see an overly muscled woman from the neck down and you cannot readily tell if it's a guy or a woman, then I think most average people would say something's amiss, besides the steroid use. So to me, there is certainly a social concept of an overly muscled woman. I also believe men can be overly muscled. There are people of both sexes who like that look however.
I can honestly say I never met a guy who was concerned about how strong his wife/gf was getting from lifting.
I disagree that personal experience does not equal expertise. There are many examples of pros in fitness and bodybuilding without advanced degrees and certifications, etc. who have excelled in this field. I doubt Arnold Schwarzennegar(sp?)bothered with taking courses in exercise physiology while he relied on experience(and steroids) to win god knows how many bodybuilding titles. And, there are plenty of people with certifications/degrees who know nothing except what they may have memorized on page 15 from some textbook. And they don't know how to apply it. I had a guy at the club today who told me about one of the trainers who did not know where the traps were located on the body. And this trainer holds one of the infamous ACE certifications that virtually the whole planet holds. The ideal, of course, is to have experience and some academics. Out of the two however, I think experience plays a much bigger part as far as being a good trainer goes. Because experience allows you to be in tune to what works and what does not work. And what works in a textbook may not always work in the real world.
Let's amend it to say there are plenty of men and women who think they're experts and they aren't. I always go by this----throughout a year, let's say, I may see the same people many times over working out at the club. If their bodies NEVER seem to change no matter how much they come in there to workout, they most likely haven't a clue as to what they are doing. My guess would be a full 60% to 70% of the people I see fall in that category.