The difference in deodorant application frequency amongst participants was the most interesting take away for me. Some tracked as many as fourteen applications to their counterpart's zero. That alone should create a subcategory.
[1] https://www.nytimes.com/2018/02/02/business/china-consumers-...
but didn't ruin the pits of my clothing.
My wife and are active and sweat a lot here in the tropical summers of NE USA. I am the clothes washer. I have lots of experience fixing this.
You can fix that by presoaking your clothes in hot water and a teeny amount detergent (and/or Borax and/or Arm & Hammer laundry booster aka "laundry stripping") for a few hours.
Can also try scrubbing some detergent directly into the pits before tossing into the wash. I've heard vinegar works too. Just don't mix vinegar and bleach.
Most people aren't doing that though. The same table also lists "No. of washes/wk", presumably referring to body washing rather than clothes washing. All except three are washing daily. True, you could theoretically be washing twice daily, but if you don't have a work shower you'll be forced to wash at home, which kills most of the point because most people you interact with during the day would have smelled your odor. Most people don't have access to work showers so it's not really realistic to expect people to showers instead of using deodorants/antiperspirants.