I don't understand how it's possible to think the green jersey isn't worth more than a stage win. For the likes of Sagan and Zabel, their green jersey hauls are far, far more career-defining than their arrays of stage wins, but they naturally have less of the former. I also don't think there's a single green jersey winner who would have traded that achievement for a stage win.
The KOM jersey has admittedly lost much of its shine but it was a huge deal for decades, so in an all-time ranking you have to place a fair amount of value on it. If you're only looking at this century, then yes, it isn't worth more than a stage win, but that's not what the discussion was about.
On the other hand, the OCTT and WCTT definitely go above all one-week stage races for me. The latter are never much more than preparation races, the former can be season-defining targets. At the very least, they should be on par with the biggest non-monument classics - Amstel, GW, Flèche - and IMO they're worth slightly more than those too.