I think women can have long hair and be taken seriously. it’s just HOW they wear their long hair. It needs to be neat, out of the way, and professional. It must not interfere with the women’s job. If they flip it around a lot and act like they are younger, then sure they won’t be taken seriously. But if they wear it professionally, then I see no reason why they wouldn’t be taken seriously. I have long hair and I love it. I always tie it back when I need to though. Personally, I think it’s awesome when older women have long hair with grey in it. I’d love to have that in the far future!