Think about Baroque ornamentation. Do we think of it as a crutch for poorly written music? No we don’t. It is simply a style of the Baroque era.
Or think about keyboards’ sound patches, and electric guitar’s pedals. Are they a crutch for pianists and guitarists who can’t play? Not either. They are just extra options for contemporary music.
Auto-tune is not a crutch for bad singers anymore. Even if it started as such, it is now a style option for contemporary music.