Earlier quoted context omitted.
As engineer, I just continue working on other tasks in every single meeting. For me that multitasking works, and I don't have meeting fatigue at all. Then again, I'm not the main decision maker most of the time.
Also an engineer - I've always found this to be really disrespectful. It's not multitasking, it's ignoring the people around you. If the meeting isn't worth your undivided attention, it's better to drop the organizer a note about why you're excusing yourself from it. Making the meeting host compete feel like they're constantly competing for your attention is just really demoralizing.
It's just an easy way to reclaim time. I agree the better solution is to trim meetings.