I think it's the other way around. Coaches and analysts will be dealing with more granular data than xG, which is really nothing more than an easily digestible model of chance creation that's a bit more reliable than Shots on Target. It's flawed, but it's still better for what it is than other stats.
Someone on the Athletic a while ago said if you get excited when your team gets a penalty because you know it means there's a high chance you'll score, then you're thinking in terms of xG and the concept is exactly the same. I thought that was quite a good counter to people moaning about it as if it's the most abstract concept anyone could imagine. I think some people try too hard to be annoyed by any mention of it, and the "it's goals that matter" line is totally pointless since obviously nobody would question that. I also accept that some people bring it up too much and use it as the answer to every question, but even they are obviously aware that it's goals that count. Nobody ever needs to be pointing that out, I promise.