Most wine isn't that good actually. There is wide range of price / marketing / effort where the chances of getting a really enjoyable bottle of wine is more luck than anything.
But if you go towards the top of the market, there is a profound difference in quality.
If you ever want to know the truth, go buy a bottle of JL Chave Hermitage (the Syrah). There are some truly legendary vintages of this wine but in my experience you can pick any vintage and be blown away.
You can probably find it for as low as $2XX. I don't want to dox myself here, otherwise I'd offer to pick up the bill if the experience didn't change your mind.
Taste that wine and you'll know. It's an expensive habit and I rarely indulge myself, but "fine wine" is a real, if very rare, thing.