They can, but the idea that they wouldn't have been cancelled before a Fireworks show, where there were plenty of nods toward possible work doesn't quite float.
I'm still not entirely convinced by this one either, with the speculation for the 2025 opening date mostly being driven by enthusiasts and YouTubers. I still think a 2026 opening was always on the cards. If it doesn't open then, I will concede that it was delayed.
The point is, plans aren't changed on a whim. Corporate governance dictate that decisions like these are months in the making. Certainly long enough, and far enough away, that if changes needed to be made to a Fireworks show it would be entirely possible.