Do security researchers really only travel with burner phones?

I'm a pen tester and don't travel much, but I saw a comment on reddit about how security researchers almost always travel only with burner phones and don't bring their work laptops. This person says they with sync another computer with their data that's stored on the cloud once they get to their destination. Just curious if anyone or everyone actually does this. Here's the full comment which goes into more detail:

https://www.reddit.com/r/technology/comments/xfmtoq/us_border_forces_are_seizing_americans_phone_data/ionieui/?utm_source=share&utm_medium=ios_app&utm_name=iossmf&context=3

burner cybersecurity phones researchers security security researchers travel