Correct, it can be very demanding. That's why one should only do so because he or she truly enjoys it (hobby). Otherwise it is a long, stressfull and dreadfull day.
JIP I have to disagree with you. By your thinking if something is demanding you shouldn't do it. I like demanding, very boring otherwise. I wouldn't fly jump planes as a hobby but I don't think I shouldn't do it. (also your logic).
I never found it to be dreadful, just good honest hard work sometimes. Thats ok, nothing wrong with that when you're earning up to $500 a day. horses for courses I guess.
regards,
Framer