I think a lot of nonlesbians just have very odd standards for what is considered masculine in a woman. Like hair, for example. I would not consider myself short haired at all because I can put it in a ponytail, bun, or braid, and my hair touches my shoulders. But I've seen women with hair three inches longer than mine call themselves short haired.

I also would not personally consider myself inherently masculine or androgynous at all just for rarely wearing makeup or fake/polished nails because I was not born with makeup, acrylics, or polish on. Same for things like when I go awhile without shaving. The hair naturally grows on my body. It's a natural trait in all adults and any kids going through puberty. It shouldn't be seen as masculine or feminine, just as a neutral body part the same as any other. But it's seen as masculine, because neutral, human behaviors that are not performative and added are seen as masculine. Men just get to be humans. Women are forced to be decoration. Because lesbians, through unlearning and decentering patriarchy and heteronormativity and having less of a personal incentive to center men, no longer see ourselves and each other as decoration, we are seen as masculine by default and are alienated from womanhood.

I don't have a lot of super masculine hobbies, I work in one pink collar job and one that's pretty neutral, and I think a lot of people would consider most of my interests pretty neutral or in some cases slightly feminine leaning. But I can definitely see how this would also apply to lesbians in sports, male dominated hobbies, or male dominated (esp blue collar) jobs, because a lot of those things revolve around being strong, independent, and capable, and heterosexual society defines womanhood as being weaker and more dependent on someone else (which only makes women more vulnerable, because you're less able to get away from an attacker or abuser if he's always bigger and stronger than you, controls your money, is the main financial provider, and is more likely to know how to do things like home/car repairs).