This is definitely a "good news, bad news" situation. Around 10 years ago, the (then) Paradise Pier pool closed for a lengthy refurbishment at the end of our late summer trip (bad news). The good news was that our roomkey cards gave us access to the
Disneyland Hotel pool which thrilled our daughters since they were able to try out the more elaborate monorail water slides.
Incidentally, the reverse happened to me and one of my daughters during a trip in late September, 2023. We stayed at the Disneyland Hotel while the pool was closed, but our room keys gave us access to the Paradise Pier pool.