Jobs are not generally meant to be enjoyable (although that is a benefit if so), they are meant to get work done. It's funny seeing office workers here on HN have this sort of opinion and contrasting that with blue collar workers, ask a miner or house builder how fun their job is.
Food is not meant to be enjoyable, it's meant to nourish. But by a fortunate coincidence it may also be tasty. Now imagine replacing ice cream, or steak, or fresh berries, or whatever you enjoyed eating, with something like Soylent or Huel with a side of puréed kale. Your nutrition may actually improve, but something would be lost, won't it?
> ask a miner or house builder how fun their job is
The average person on a residential job site I've talked to has looked and sounded like they're having as much fun as the average software dev. And none of them have said stuff like "people on my team have confided that they cry every night because the higher-level management keeps screaming about the project not being done" like I've heard at from folks, say, certain big social media places...
Don't many blue collar workers (miners & house builders) do actually take immense pride in their work? There are woodworkers out there whose hobby is also woodworking.