This article, like every study of dopaminergic neurons, is about specific neurons that happen to use dopamine for some of their signaling. It's incorrect to extrapolate this to generalizations about what dopamine does or does not do, because it depends on the specific neurons.
I hate myself for 2-5 hours after intense sports. When I still did go to the gym I had to avoid people afterwards, each time.
Same for cocaine, it's fun. Sure is, but I don't like the personality I get. Nether do others.
I did Alcar (some dopamine level pushing nootropic) for a while. I loved it, but everyone started to beg me to stop it.
I still have no idea why I can't have fun with dopamine. Or what this ultimately means for me.
Important takeaway: coffee does not lower the baseline dopamine level. Yes!
NB not affiliated with authors.