Sure its nice to be "loving what you do" and its always better than having somensort of external pressure.

Now saying you really prefer to do specifically useless stuff seems like glorifying a weakness for no reason. Why not leaving an open door to both have fun and make money ? Seems like the author tries to make some moral/practical higher ground because he cant deal with the ambivalence of whether what he does is for some "inherent" pleasure or for money.

At the end of the day the way your deal with you psychology is not my problem. Having fun if is cool. Making money is cool in another way. If mixing both is too hard for you the maybe you really dont have any real problem in your life. That post wont get too much of my sympathy.