Sure there are ways to avoid verification in the West but they haven't even tried it at all. Have captchas, or phone verification that require a password to be added, or an app that constantly updates a security password like Steam Guard. You'll see that once an extra step has to be taken to keep hacking most people will stop, because most people don't want to take the extra step to do their stuff, and it doesn't matter if these people leave the game, chances are they didn't even wanted to play.
You're right that they didn't want to play.
They wanted to make money, though.
The vast majority of bots in GMS are operated by people looking to make real-world money off the game, by selling meso or items.
They will go through whatever extra steps are needed, because it's their livelihood at stake.
The Black Mage content was available to all characters of level 200 and higher, over the winter (December-January).
If you missed that, then yes, you're going to have to grind to 245 and above to see the story to its completion.
I think it's only fitting that in order to defeat the ultimate boss of the game for the past ten years, you need to get nearly to max level.