Unless you’re lucky enough to live within driving distance of one of the world’s great wine regions, the liklihood of being able to take high quality wine classes in person, is well, just not very good.
Online classes for wine work well, because when set up well everyone can be in a video chat while drinking and talking about the exact same wines. My wine of the month club does something similar where everyone in the wine club can get together and enjoy a glass of wine together online while learning about the winery, winemaker and wine region which produced what happens to be in all of our glasses. For those of us without a lot of wine drinking friends, this makes a ton of sense!
