Are we talking about alts? Or our main characters? If the former, then no, no one is forced to level/quest again if they don’t enjoy it. People should stop making alts if they hate the alt experience so much. If the latter, then yeah, that’s WoW. If people have a problem with leveling in an RPG, they should probably find something else to play.
Also, I don’t know what sorts of alternatives you might be referring to. There are multiple ways to level up and people are free to choose whichever one they enjoy the most.
I’m not sure what difficulty you’re talking about. Perhaps you’re playing on a realm with a population too small to sustain playability? I’m on a very large realm, but I’ve played on multiple small or faction-death realms (one of which was Whitemane) and I haven’t had much issue finding people to run low-level dungeons with.
Let’s also remember that when dungeon carries are broken, the majority of the long list of players you’d normally see sitting AFK at an instance portal will now be leveling as intended instead of exploiting.
Those things don’t remove or trivialize the distances in the world. Which is precisely why so many people are always incessently whining about wanting dungeon finder’s teleport. Those all require some kind of investment such as gold for faster mount travel or playing a class that brings that utility to the table, or requiring two people to travel to a summoning stone before others can be teleported. They speed up the process of travel in exchange for some cost, but they don’t remove it from the equation when you need to get to a dungeon.
Those don’t belong in the same category as something that checks notes
not only instantly teleports the entire group into the dungeon regardless of where they’re all at, but also costs nothing to do so and can be used infinitely.
If you really do think they belong in the same category, then from here on out I expect you to completely reject the idea of a dungeon finder teleport because you would definitely think that it would be redundant to have that on top of all those things you listed.