I've had $15 wine and $200 wine and the difference in quality is absolutely zero.
You're only paying for image, the chateau and their "story".
LVMH owns some more expensive wineries or champagne houses and they are notorious for branding mediocre crap as luxury by raising prices in their other businesses like clothes and handbags.
Oddly enough, in coffees price does correlate with quality. Preground $3 bags of coffee taste like dog shit. Medium priced beans that you grind yourself taste ok.
Expensive beans that you grind yourself taste amazing.
Coffee is a much cheaper hobby than wining though.
There is a cutoff point for wine where it becomes horrible too though, it's around $10.
That's because they are mass harvested with the stems, bugs, spoiled grapesthrown into a huge steel vat to ferment.
But there is generally no justification for ever spending more than maybe $20 on a bottle of wine for dinner unless you are buying for status purposes (business meal with colleagues etc) or as a gift.
If even people like Parker who literally has a scoring system named after him can be fooled in a double blind test to think a $25 wine is better than a $800 wine, premium wine is complete bullshit.
Which it is.