Yet primitivist delusions seem to get a full pass around here.

The best way to tune the algorithm on Youtube is to aggressively prune your watch/search history.
Even just one “stereotypical” video can cause your recommendations to go to shit.

Is there anything the rest of us can do to cultivate such a mindset?

For cardio it’s basically “go slow”. The main source of discomfort is the exertion.
An easy long run with good music is quite meditative and enjoyable.
When your legs hurt and you’re wheezing your lungs out, not so much.

Running, not so much because my calves tend to seize up and it gets a little painful

This is often a form and/or a shoe type issue.

Twitter probably opened the floodgates when they managed to shaft users and cut API access without outright killing themselves. Now everyone else is emboldened to ask “why can’t we do that too?”.