Can you envision a world in which mtf crossdressing is normalized

No.
That'd be a horrifying world. You couldn't look at a high-heeled short-skirted figure anymore and go "I'd tap that" because it could be a feminine man.
That's a terrible thought.

I have nothing against crossdressing, as long as it is done at home, with the curtains closed.

Yeah, but if most of society has a problem with a tiny minority (and let's be real, if only 3.8% of people are gay, there'd be way less than 10% crossdressers), it's the minority's problem, not the majority's.

That's a remarkably relativistic way of thinking about something as inane as wearing a skirt.

What problems, other than mild discomfort, would this cause the majority? And also, who claims the majority has a problem with it?

It's not "mild discomfort". I'm close to vomiting if I notice I was mistakenly attracted to a woman that turned out to be a guy.

It would also cause much awkwardness when you approach a woman based on the appearance of her behind and then notice you just hit on a guy.

And it could cause sexual confusion in teens, that are still looking for who they really are.

It's funny to me that you are touting age-old conservative dogma.

Cause sexual confusion in teens?

Seriously?

Yes.
I don't believe gays are born gay. I think they become gay through influences in their childhood and teens.
Now, being gay isn't bad, but only as long as there are still enough hetero couples to produce children. And if you do that and confuse younger people, that could end up making more people gay.

Let me get this straight:
You don't think gayness is innate. But you don't think being gay is wrong. However you think we should protect children from "gay influences" to assure that there enough hetero couples?
These are astoundingly irrational statements

Exactly.
I don't see the irrationality though.

Let me spell it out for you. You're contradicting yourself.

If there really is nothing wrong with being gay then you don't have to "protect" children from themselves.

You attach the most ridiculous rationalization to it: to further the human race.

This is so simple minded it is stunning

I have nothing against gays because they aren't hurting anybody. Have consensual sex with adults, I don't care who they are.
But the fact is that they do not contribute towards the continuation of the species.

As such, introducing major things that could cause confusion should be avoided.

Always vague fears and no real argument. What about progress and education and acceptance?

I'm all for those.
I accept gay people. I don't have anything against them. I don't think they should be killed, or converted, or whatever other stupid shit there is. Let them live their lifes and fuck other dudes or girls or whoever they want.
I just don't think that we should unnecessarily create more of them.

"Progress" is hard to define though. "Progress" towards what? One person's progress is another person's regression.

The cross-dressers can live their life in their homes if they want to.
Outside of that, society has certain standards of decency that you need to conform to and I'm grateful for them.

Your fears are very telling

I am not gay and I'm most definitely not a crossdresser and I'd appreciate it if you didn't insinuate it either.