These models always create pixel art that looks like garbage because the people using it don't know enough about the medium to properly judge the output. This article is no exception. If you want pixel art for your project then learn or hire someone with that expertise
Are you saying people unfamiliar with the 'pixel arts' can't enjoy it their own way?
I don't think the author is posing as a professional. These models are like having a 3D printer at home. Very handy in a pinch, but what they make doesn't replace the real thing.