I think they mean if you’re a woman (trans or cis), it can be terrifying to meet with people. At least that’s how I interpreted it.

Edit: Perhaps they are also talking about non-binary people, which is why they chose the words “not male presenting”.

People think they are male when they see them.

In addition to what the other posters said, even merely being a skinny twink (insufficiently male-presenting) is dangerous in some places

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