It's slow. It encourages mis-taps. I have intentionally tapped it literally <10 times ever despite using the share dialog thousands of times, since it almost never shows me the desired contacts, and even then I've tapped the wrong contact half the time.
It's incomprehensibly awful, wantonly violates even the most basic user-interaction guidelines of the past few decades, and there's no way to turn it off. What in the world are they thinking / drinking.
When you are in the “...” screen, tap on “edit” at the top right.
This is what OP complained about is not possible on Android out of the box.