Just because there are people in their mid-20s that you can kill once or twice on pvp servers does not mean world pvp is a thing.
Back in wow classec, enemies ingame didn't necessarily have a 60 to log over to, and wouldn't be able to get to you quickly even if they did, thanks to +100% ground mounts being the best available, and prohibitively expensive for many people anyway. If you started pvping with someone in a questing zone, they pretty much had to fight you off with that character, ask for help from other questers in /1, or log off.
Add to this the fact that stat inflation wasn't absurd in classic. Several 40s could definitely fight off a 60, because raid gear barely existed. 60s only had twice your health and damage. These days, every single class at 85 can one-shot a lv 55 with their go-to damage spell. All it takes is for one person to get upset and bring out their 85 and your world pvp is over. Within minutes. A full raid group of lv 20s couldn't possibly bring down a level 85, let alone a little 3-man "world pvp for lolz" expedition.
This led to long and interesting world pvp fights in questing zones in wow classic (and early TBC to the extent that 70s were rare). People using pvp to settle conflict ingame; you could expect a fight to go back and forth a few times, and you'd continue to run into the same levelers for a few days in the same few zones. It wasn't fun for everyone all the time, but it was sometimes very fun, and the PvE vs PvP server decision was an interesting and worthwhile one. This has entirely ended due to the one-sidedness of max-level vs sub-max-level fights and the ease of bringing out an 85.
World pvp as a thing has been nerfed into the ground and is never coming back. Even the areas designed for structured world pvp (halaa, auchidoun, silithus, EPL if it survived cata) don't have any protection against 85s ruining the day, so it's no surprise that no one does them anymore, even when leveling through the zones.
An 85 in quest gear is an opponent that literally cannot be beaten by sub-75 players even with absolutely perfect skill and coordination. World pvp cannot exist below level 85, because anyone who logs over to their 85 literally and unquestionably wins unless you can do the same.
(This is why I think item squish would be a fantastic idea, btw)