I suppose maybe parent is mixing up difficult work and difficult hobbies. There are plenty of hobbies which are difficult and require a lot of hard work. Hobbies can be frustrating and yet still enjoyable when you overcome whatever it is that hindered your progress. Someone who does painting as a hobby might face a period of no inspiration - it can be immeasurably frustrating and it completely blocks you from painting. And then one day you see a particular way that the stained glass window reflects light onto the pavement and something gets switched inside and then you proceed to feverishly paint every waking hour and it will feel like it is not you who wield the brush but that you yourself are some sort of instrument being used by something greater.
Game dev is an arduous and draining process that both requires the patience to go through periods of dreary work where no progress seems to be made and yet the creative spirit to devise art, concepts, mechanics, rules, etc. If I had the time, I could easily see myself spending multiple years on a project like that without the need to see any financial reward. I wouldn't see it as work, I would see it as Work with a capital W. A hobby that requires a lot of personal effort but something I do because purely for the joy of doing it.
Game dev is an arduous and draining process that both requires the patience to go through periods of dreary work where no progress seems to be made and yet the creative spirit to devise art, concepts, mechanics, rules, etc. If I had the time, I could easily see myself spending multiple years on a project like that without the need to see any financial reward. I wouldn't see it as work, I would see it as Work with a capital W. A hobby that requires a lot of personal effort but something I do because purely for the joy of doing it.