@michael I believe the exploited number is meaningful because after it was published or patched there is usually enough public information about it to write an exploit. I believe there are documented cases of exploit writers vibe coding exploits for recent published CVEs pretty quickly. (Even a silently released patch reveals a lot of details.)
Exploits for already-patched vulns are still useful because so many organisations are very slow at patching or even never patch. It's not rare to see news stories about new exploits for RCE bugs that have had patches available for months to years, still managing to pwn a few thousand installations.
So if a given vuln is useful to miscreants, you should expect there to be exploitation of it in the wild.
(The only time I would expect timely patching to completely erase the value of a serious vuln is when the vuln is in software that only one organisation runs - like SaaS products where patching is completely under the vendor's control.)