I remember taking the upper level thermo courses for my undergraduate. Through the semester, they introduced a handful of equations for specific scenarios. Then the final was like 4 questions in 3 hours and with the equation for Gibbs Free Energy.
It's been a long time since I played and I was never professional, but I just powered through. The calluses build up relatively quickly if you keep with it daily. Sometimes I wouldn't even play, just form chords for as long as my fingers would let me to reinforce the calluses
You could also try lighter-action strings. I've had some that were very heavy and absolutely not worth the pain. But as the saying goes, "you've got to pay your dues to play the blues"
At the very least Gary is out there spreading his message in a way people can understand and trying to help people understand that the rich are stealing from us.
I got a Mozilla plug-in just to block Data Annotation Tech because they have a thousand jobs listed under different names for what is essentially the same AI training job. Super sketchy and they only pay through PayPal
Keep in mind that they also broke into the Treasury system and own the paychecks of every federal employee. If that's not leverage, I don't know what is