I can truly say that MY machine quilted work is inferior to my hand quilted work. Doesn't mean that there may not come a time when my machine quilting will improve enough for me to be proud of it!
In fact I'm not totally pleased with my hand quilting either.
I've seen some absolutely superb quilting posted on this site. Some is done by hand and some is done by machine. Both are works of art. As someone earlier stated, different skill sets are required for each. I would like to become proficient in both. Not sure it will ever happen, but I can dream big. Lol!