why is castrum and praetorium not an instance

[Nezerius]

Im really have no idea how im gettin beat up about this Im assuming you guys are clearly not into the story part of the game , Im not talkin about the stone vigil cut scene that was also in the middle people will even leave u over that. This is some of the biggest content of the game , like yea i could of asked for a party sure Ive never even used party finder and my friends didnt want to watch the cut scenes so I didnt ask them. Like I said if the game devs said it was wrong then why am I wrong for wanting them to change it

Because you're beating a dead horse at this point. Actually, you're beating the dead horse's ashes, that's how often this complaint has come up in the past years. There's no point in complaining about anymore since it's not going to change those two dungeons. But it's a good thing that they still learned from those complaints, since this issue hasn't occurred ever since.
You're not wrong in wanting to have it changed, neither is SE wrong for not changing it, if they don't want to spend resources on it.

Never having used the party finder isn't a good reason, nor is deciding to not ask your friends just because they skip them.

And your assumption is wrong, I'm into the story part and ensured that I'd be able to enjoy CM/Prae to its fullest, by asking friends for help.