Honestly, I understand what she is saying. While it could be argued to be over the top to say the trip is
ruined by one ride being closed, if it were me and my favorite ride (Splash Mountain) were closed, I'd be very, very disappointed. It might not ruin my trip, but I would have a LOT of regrets about the timing. Also, you have to allow for the fact that her response came immediately after hearing the news. Most likely, she will think it out and come to realize that, as you said, there are lots of other great things to do at Disneyland. If what the previous poster said is true, there's nothing to worry about anyway if the refurb is only for two days!