IWW being considered a classic album is not some Nas fan specific argument though. If you were to say the idea of Untitled or God's Son being classics are Nas fan/stan specific arguments then yea you'd be right. IWW being a classic is not some controversial take, and certainly not in New York.
The thing that confuses me is if everyone or most people think Nas only has one GREAT (or classic) album, why is he an automatic top 3-5 rapper in the eyes of so many people from that era and eras after? Clearly there's something missing here. You say he has multiple good albums and I'd agree, but there's a disconnect here. A lot of dudes from NY got one great or classic album. Why aren't they held in the same esteem, especially in New York?