It's ok if you don't feel a need to change your persona workflow.
Nevertheless I'm not sure you understood the example, so I'm not sure you fully grasp the differences.
The whole point of my example was to point out the fact that, thanks to interactive rebase, you do not even need to switch branches to work on multiple unrelated PRs. You can just keep going by doing small commits to your local feature branch and keep doing what you're doing. In the end all you need to do is simply reorder, squash, and even drop commits to put together multiple PRs from commits that are built upon each other.
Simple, and straight to the point.
Fair enough.