"need to drink it fresh" is a red flag about the roast, usually, unless you really do prefer something fairly dark. Light roasted coffee should be let to gas off for at least a few weeks.
Not sure on the off gassing comment, I drink what I think tastes good. Espresso pretty much exclusively, lightly fruity, low acid, with a rich sip and a non-bitter aftertaste.
Taste is subjective and you can call them snobs but they have a great point. Even if you love burnt flavors, there are far more ethical options than Lavazza.