Sure, but no matter how big of a hurry you are in, you are going to be sitting on the plane waiting for the door to open and the people in front of you to leave. I always use that time to gather everything up, and a steamdeck is really quite big.. you can’t leave it in the seat back pocket or something.
I am not trying to victim blame or anything, I just can’t imagine a situation where I could forget something so big.