In order of priority 1.) Safety, 2.) Comfort, 3.) Punctuality, 4.) Anything else. That 'Anything else' is a commercial decision on almost every occasion. An airline captain announcing that commercial decision to the pax will almost always result in no. 3 being compromised by angry passengers and sometimes even no. 1. As stated in the press release, if they didn't depart Bilbao in time, the return pax would have to be accommodated. The airline industry operates on razor thin margins. If the public paid a fair price, maybe more planes/pilots would be available to perform rescue flights for delays that are actually completely outside of their control?