I don't know why finding that other people have different work patterns and preferences would confuse you. I'm not "attempting" to use an iPad -- I've used an iPad and a Chromebook (currently Pixel Slate, also a tablet) for five years professionally. I used a MacBook before that. I'm old enough to remember hauling a VT-100 and an acoustic modem home to work on weekends a long time ago. I'm also old enough to remember people saying no professional programmer could use a personal computer, or a laptop.
I don't use Kanban or constantly switch to chat. I can see if my VPN is running by looking at an icon at the top of the iPad screen. I don't constantly task switch while working.
It has nothing to do with weight or feeling silly. I want to concentrate on one thing at a time, and I want a portable setup for working because I travel a lot.
An iPad developer setup won't work for everyone, but for the people it does work for it can work very well. 90% of my programming is done over ssh to remote servers, and the iPad can do that perfectly. The rest of my time is dealing with email, also fine on an iPad, or Slack, or reviewing PRs, which I can do right on my iPad.
Other developers have different requirements.