Because they don’t know anything about beer and it’s basically a meme at this point that boomers came up with (rooted in truth in their defense) because we spent decades rebuilding our beer scene after prohibition and, more importantly, Carter’s legalization of homebrewing.

Germany - like most european countries - is amazing at making old world/regional styles. You don’t go to the US to get a Czech Pilsner or a proper Marzen or rauchbier. You get stouts, hazy IPA’s, etc. Germany even relaxed its laws on what qualifies as a proper-made [insert style] about a decade ago to be more competitive with the US craft beer movement.

This is like complaining that some country doesn’t have amazing champagne like the champagne region in France or a New Yorker whining about how they can’t get a quality New York pizza in Idaho.