srw
It's a bit more complicated than that...
Need? No.Does red wine really need to 'breathe' for a while before drinking?
Does white wine really need to be chilled?
Last night's bottle of Pinot Grigio definitely got more quaffable as it crept up to room temp.
But oxygenation and changing the temperature of wine certainly changes its flavour. In general (as someone's said), tannic wines benefit from oxygenation because oxygenated tannin is less bitter - but the best way to do that is by decanting or by swirling in the glass. White wines tend to be made specifically to drink chilled, so if you want to get the flavour the maker intended it's better to chill it.
None of this is about class - it's about caring about making what you drink taste as good as possible. It's no different from having a strong preference on whether bacon is better with brown sauce, or chips are better with liquor, or whether a kebab is better from the paper or on a plate.