Disagree. AI has is taking all the parts that remove the fun. Now people can truly have fun with that which they find interest in, because there's a way to avoid the parts they're not interested in engaging with, with little to no consequence.
Now I can safely hand this all off to Claude while leisurely browsing e621. The unlock is incredible, and I wouldn't trade this velocity for anything.
That assuming what you've said is true, which is not. In a work environment, you're forced to optimize whatever that there is, regardless if it's fun or not.
Moreover, there is always fun to be had even in tasks you've found boring beforehand.
This doesn't really pan out the way you think it does as people can always choose to do boring things if they want (if there's even any truth to your assertion). Unless your argument is something along the lines of humans need to be forced to do things they don't want so they're able to find fun in anything, which I think is pretty... wild.
If all you do is having fun, it's obvious you'll need a new bar over and over (which is literally happening nowadays).
Throughout history there has always been at least one group in societies (if not the whole) who didn't have to do anything they didn't want, and said groups have survived through the centuries. Now we're just at the point where it's very feasible for all in any given society to once again not have to be forced into anything and still thrive. What's needed is for that incompatible system that conditions forced labour to be thrown out.