> You can see this pattern in people who exercise only with some combination of pre-workout, caffeine, music, phone scrolling
Where do you see this pattern? I would wager nowhere, even if it sounds like it "could" happen. I've worked out with a lot of people. I listen to music while working out, as do many people. I would enjoy working out less without it. But I'm not in some Dopamine spiral where I need to stack more stuff on top just to keep working out. I've been doing it for years.
I've noticed a lot of health influencers like Huberman, who need to make content frequently, have been honing in on gut-feeling conclusions derived from novice science facts you can expect anyone to know about. He casts a wide net with a Psychology Today level concept, and he builds an audience of people that can't separate the lazy conclusions he makes from the objectively true but elementary facts he bases them on.
Look at the comments, where people are accusing each other of being dopamine hijacked because they eat and read at the same time. Give me a break. Your reward system is not a fragile thing that is easily broken. The actual causes of dopamine hijacking are things like spending all day playing video games, not having a coffee before working out.