15 * 2 minutes a day 5 times a week is 100h+ by the end of the year

It's 1.4% of the year (assuming that 130 hours a year is correct I didn't check it). That's less than two ounces out of a gallon of liquid or less than half a centimeter out of a foot.

In what other things is 1.4% considered "significant?"

Taxes jump to mind. COL adjustments vs inflation for the past few years also comes to mind. Beating some measurable world record by 1.4% is probably a big deal. I'm sure there are more examples if you look for them.

Bro nobody is spending 100% of their time being productive. we have to have transitional time. time going from one place to another is a net benefit because living in one box is anti-human. for me the cost of the time is so so worth it because i feel so much better seeing my colleagues in person. i become a shell of myself if i don't leave the house so losing the time is something i'm very okay with. its such a small amount of time to make my life 200x better.

You can read 10 books during that time. It's not like you need to sit there, do nothing and intensively hate your life 2 * 15 minutes a day.

Or, you know, it's 15min exercise which you need just the same :)

130h a year, assuming you work 5 days every week and that every commute is exactly 15min.