A very good point.
my point of view is very simple. It’s winter....too cold to ride outside.....COVID shut down our gyms.....so it’s the indoor trainer.
Zwift is just a computer interactive computer game which we get to virtually meet up with others while we get some saddle time.
the power meter on the crank and your heart rate numbers don’t lie....if you work....the numbers are high...if you slack off..they are low....you set your threshold. The trainer doesn’t help with the numbers.......but data doping does.....lots of sand baggers on Zwift!
the type of oil....if it stops my leak...which it looks like it did .....and saves me some coins for some other toys........looks like I accomplished my purpose.