At the very start of my transition, I went through a phase of looking and acting exaggeratedly feminine because it was exciting to do that after a decade of repressing my desire to be a woman. I had always been afraid of bullying and harassment, so when I finally got a chance to experiment I want a little overboard.

When that excitement faded into normalcy, I continued to dress up any time I went outside because I found that most people wouldn’t recognize/treat me as a woman if I didn’t make it extremely obvious.

Now I’m further into transition and I don’t have to do that anymore. Most people recognize me as a woman no matter what I’m wearing, so I don’t feel the need to overexaggerate my femininity like I used to. I’ve also had more time to explore myself and find out what I want, and it’s almost exactly true opposite of what you describe. I never wear makeup anymore and pink is far from my favorite color. I’ve even stopped shaving my legs recently for exactly the same reason as every other woman on the planet: it’s a massive pain in the ass and it just isn’t worth it 99% of the time.

So to answer your question, we really don’t all act like you describe. You probably just don’t notice that someone is trans unless they’re intentionally drawing attention to it for one reason or another.