[veggieburglar]

This is not true, "natural wine" is exploding and there are quite a few wines out there that do not contain any added SO2. We get people in asking for them all the time.

However, the vast majority of wines do contain at least a small amount of added SO2.

There are plenty of expensive wines out there with lots of manipulative additives (sucrose, acidification or deacidification, oak powder, etc) as has been outlined above, but it is much more common in less expensive wine.

There is a scale between wine as a mass produced industrial product and as an artisanal, site-specific hand crafted product, and there are wineries/brands/specific wines that fill in every conceivable spot on that spectrum.

Oftentimes, individual wineries will have different lines of products made in different ways or even in different facilities. Estate grown vs purchased fruit. Physical wineries vs "private labels" made at custom crush facilities. A little tangential perhaps...