"Recent findings in the field of neuroscience have, however, demonstrated that a single functional circuit, incorporated inside the broader dopaminergic mesocorticolimbic system, seems to be involved in the various experiences of pleasure"
https://www.frontiersin.org/articles/10.3389/fnhum.2018.0035...
Going back to your accusation of "faulty logic": an interruption in the ability to experience pleasure, which is established to be controlled by biological processes, having a basis in a biological process would be deductively valid logic. Anhedonia is an inability to experience pleasure.