might be closer to accurate if the 2-5% is his estimate of the physical time spent making key-strokes
That's <24 minutes per 8 hour day.
If you're reading this and that matches your experience as an IC SWE whose job is ostensibly developing software.. you're either trapped in a very atypical org, or you're heading for a PIP.
Nope. I would bet most people really only do 2-10%.
But we would like to convince ourselves we don't.
Surely we should only count the time actuating the key. Apple keyboard users are in shambles.