Exactly. I went at the start of September this year to see the last Disneyland Forever and MSEP and the beginning of Halloween, but it just happened that the Matterhorn, the Disneyland Monorail, Tom Sawyer Island, and the Explorer Canoes were all closed (on top of ToonTown being closed). But we got the see Haunted Mansion Holiday, four different nighttime spectaculars, MSEP twice, and do a bunch of rides that we don't have in Orlando.
Would I have loved going on the Matterhorn? Yeah, absolutely. It's a classic. But we still had a great time. There's never a perfect time to go.