They are not the only royal couple who happens to work, take Maxima as an ex. the woman is going to have the baby in a plain and she and hubbie are in almost every royal gathering, the woman have being in the three corners of the world being pregnant, same for the other royals womans and couples who also happens to have a family and don't care less for them, some with even more kids to left behind or to take to the gatherings, by the way and of course the relashionships are never the same when you start a family because the lack of time and responsibilities that's why when you have a chance to disconnect, to relax, to stretch relashionships and get together you go and make an effort, take your kids w/ you if possible, take your best outfit, put your best face and meet with your pals or the people you know are important in your circle and you show them respect and that you also care for their weddings, their baptisms, their birthdays, their anniversaries, it can't be always about me me and me and mostly when you have all kind of luxuries availables like nannies to take care of the kids when in the night party, not to have to travel pregnant in a sardine tin like the rest of us, and things are taking care of ad infinitum; because for that rule of three every couple w/ family would of being isolated, will not travel if will imply a celebration etc. In Thailand you could see many Kings and their heirs, la creme de la creme was there and countless events w/o Felipe and Letizia who are royals, not politicians, who's natural environment so to speak are among royals, I mean, you can write and write excuses but the facts are there, we can fill out pages with pictures of Felipe in Royal gatherings pre wedding, they are royals after all... no? and they, as a couple, have being absent of almost all the royals baptisms, parties, birthdays, aniversaries, etc of the last three years so... I don't know if Letizia happens to like those gatherings or not, i'm not looking for "culpables/guilts" because it takes two to tango but it could be both, maybe she, or them both, dosn't like to be with their own natural coleages anymore or the SRH prefer to cover those events with the Kings, Elena and hubbie, Cristina and hubbie, etc, maybe their are winner assest or maybe is just casual but those are facts, is time for Felipe and Letizia to start to show some respect for the royals who also have their own problems and make the time to being at their wedding day and are part of their natural circle, I guess between royal houses they should say "send the invitation because of the protocol but don't put their cards at the dinner table".
BTW. The excuse that Felipe was at every gathering before get married to look for a girlfriend, somebody says something like that, please, we are all grown ups, there are better excuses, or the rest of the marry princes go to the gathering w/ their wifes because they are still looking?, please.