It’s important for Disney rides to undergo refurbishment when they need it.
We know, it’s frustrating for guests who want to experience the attraction when it’s unavailable, but if the ride isn’t kept in good shape, it could break down for even longer. That’s why Disney schedules refurbishments exactly when they’re needed for short times (not if you’re Rock ‘n’ Roller Coaster, though, then you’ll take forever). If you’re in Disneyland soon, beware that this ride is closing for TLC!