Transgender people are mentally ill. You can't just change your gender just cause you feel like it. What I find funny is that these people feel changing genders makes them feel better...yet the suicide rate for transgender people is through the roof.
High suicide rate is pretty much telling you these people aren't doing it simply because thry feel like it. It's a tough situation, some people legit feel like they were born the wrong sex and it's obviously incredibly hard for them. Thus the high suicide rate.
Trans gender black dudes who become women also have the highest chance of being murdered out of any group.
Not an easy life for a lot of these people.
On the other hand, many countries are perfectly open to transgender so it's a cultural thing too.
At the end of the day, who fucking cares. It's just like anything else - let people live how they want to live and mind your own business. If it's not part of your world, don't worry about it (as long as it's not hurting anyone).
On the flip side, the SJW out there take things way too far talking about needing a third restroom installed in buildings, as if that's economically possible, or all this talk about the spectrum. It's ridiculous and they need to all STFU. Technically, there probably is a weird gray area of the "spectrum" but it's so incredibly rare it's not worth trying to make special categories for. Like a hermaphrodite or weird cases when women have a lot of natural testosterone like that Olympic women's runner who was proven to be a female just has a really strange and weird case of natural testosterone, etc. These types of things are super fucking rare.