There has been a saying around since the beginning of time that applies.... "In life, timing is everything. Things change... we flex or we die". You can't really, seriously, think that a place that provides a venue to thousands of people per day like WDW does can possibly take every single persons individual schedule into consideration, can you?
There has been plenty of promotion about the Gondola's over just the last year that unless people live under a rock or don't really care are going to not know about it. Then you have that other factor, of the number of people that reserve for the very week that the Gondola's open up, how many of those people are actually going to have a problem with riding something that is, for all intents and purposes, a kids ride. The numbers are mindbogglingly small and I think that Disney has taken that into consideration.