iPhone X Iphone X turns on with one click instead of hold?

Yes that’s normal.

 

Why do you want the phone to be off in your pocket? Put on DND if you don’t want to be disturbed.

 

You phone isn't "off" if clicking the button turns it "on". It is in sleep mode. To truly turn it OFF you have to hold the button down until the the "Slide to turn off" option appears.

 

You have to hold the side button AND the volume up/down button to get the slide to turn off prompt.

 

Before the iPhone 8, you needed a long press to turn on the phone from ‘off’.
On the 8, 8+, X, XS, and XS Max it only takes a click.

 

That's a bit strange given that it would be that much easier to inadvertently turn on the phone like that when you might not want to or expect to. Coupling that with somewhat more complex method of getting to the power down screen, this essentially seems to be the opposite in terms of the usability approach behind it.

 

Yes, I’ve heard that it’s annoying when replacing screens too, as it’s easy to accidentally turn the phone on and risk a short circuit while opening and entering the phone.