That's a stupid generalization from Bethesda. It's no where NEAR as stupid as "JRPGs are not RPGs" - Bioware (who also said Call of Duty was an RPG because you "put points into things").
The first response to this thread is right, but I'll add: Graphics do not matter to many people unless they are paying 60+ for said game. I paid 40 for Persona 4, and look at those graphics.
Also look at all the fantastic reviews it got.
If I pay 60+ for a game that is from a big name developer and backed by a big name publisher, I expect high-end graphics (big name publishers who are in the red are excluded from this rule). Lesser publishers I can let slide since, as is obvious, they don't have the financial backing the bigger ones do. J/ WRPGs, MMORPGs, and free-roam games also get a pass because of the man hours and content needed just to put that kind of game together.
So, in reality, it matter but in genre and pricing related senses. Bethesda, you haven't yet, but don't stard slagging off people's ideals over gaming and pouncing on everyone because you're making a seemingly incredible title. Just look at EA and Bioware and realize how shit things can go for you PR wise. Keep it shut until Skyrim has broken selling records, and for added measure keep it shut even then so you don't turn fans off the DLC you'll be promoting after the release.