I think people are trying to understand what you mean by 'masculine' and why it matters. Your views on what 'masculine' means or looks like (rugby players and boxers) seem rather narrow and dated.
It doesn't matter really. I'm talking about the traditional stereotype of masculine men. It's obviously not going to gel with the sizeable minority on mumsnet who seem intent on pushing the whole 'boys can wear dresses too' thing. Yes they can, and should if they want to, but the average person is not going to view a boy in a dress as being as masculine as a boy playing rugby or dressing up as a cowboy, no matter how far we go down the "oo, but what defines a man" rabbithole.
In regard to BC I hadn't realised he was talking about his film. However, anybody who tells others to "shut up and listen" can generally fuck right off IMO.
I do believe there is such a thing as toxic masculinity, especially in regard to men not wanting to discuss their feelings etc, but too often it's just used as a lazy stereotype against a particular type of man. My partner is one such bloke. Genuinely nice guy who would help anybody, and both responsible and successful in his career. However, he's also pretty muscular and has a squashed nose from his boxing days, which I actually think adds to his rugged charm. He generally dresses pretty well so doesn't look thuggish but I notice certain types of men seem to get intimidated by him, especially the hipster manbun types who my sister works with. It comes across to me as lazy stereotyping mixed with insecurity.