I would think that it would probably be a generality that a physicist would likely consider discovery as generically more pleasurable than many other pleasures, or else one would not choose to be a physicist
True, but this choice would then be tested by actual experience once the choice has been made. As another example, consider somebody who chooses the law as a profession. Many who make that choice continue in a long and pleasurable career, while others quickly burn out and find something less painful to pursue. And for the ones who remain in the profession, often a process ensues of navigating their way to the most enjoyable way to practice, which may prove to be far different than the practice they initially envisioned.