I agree---it seems the poster you quoted (and a few others) see the wedding couple as only taking their own wants into consideration (which might be the case---you never know). I am not seeing anyhting that makes me think that is the case----and that IS the heart of the matter and where the disagreements come in
I think that too. It's not to say that anyone is wrong because they aren't and I respect everyone's right to their own opinion obviously I want to be respected for my own opinion as well. It just the first impression is basing what we all seem to feeling towards this situation in how the date was chosen and to another degree how the OP (who is the mother of the bride) is describing the mother of the groom.
I know for me personally none of our families were really involved in the decision making for our wedding aside from my mother-in-law wanting a few people and not wanting a few people at our wedding..we let her know it was our wedding though so while we understood her feelings we still wouldn't be inviting people we had no personal connection to and not inviting people who we did have personal connections to just because she didn't want them there due to her own personal interaction with them. ETA: We did however allow some friends of her to come that we didn't know at all as she decided she really wanted them there and would pay the $30 some dollars per person cost for food (I believe it ended up being 6 people).
That being said I would say 80% of our decisions we made were based on the consideration of our guests which included our immediate family members-
~venue choice (which doubled as the ceremony and reception place) as far as ease of guests including free parking (ETA free parking downtown was next to nil so this was an important detail) and comfort of the chairs that were included in the venue. While we absolutely loved our venue a main selling point was a covered parking garage with an enclosed walkway connecting to the venue which happened to be the main level of a commercial high-rise Downtown combined with an off-duty police officer already included (an off-duty police officer is required at most venues in our Downtown area for each hr of your event ranging from $30-40 per hour charge).
~food choices and silverware choices (plastic versus real)
~Alcohol choices as well as we chose an open bar where we pre-paid so guests wouldn't have to worry about tipping or paying for their own drinks
~cake flavor choices
~DJ song choices to an extent
~seating arrangements (there were none save for 2 tables saved for our parents, we also had our bridesmaids and groomsmens significant others sitting up with us on the main table because I understood how it would feel not being able to really sit next to your bf/gf, husband/wife, fiance/fiancee, etc)
~the bridesmaid dresses and how each of my bridesmaids (I had 2 and then my maid of honor) would feel in them as far as body image and if they were going to be comfortable to be in them all night, etc.
And there were so many more. The point is one of the very few things that my husband and I chose based on our desires and not so much others was the wedding date..and if that's all you really knew about me in this situation...
*Again though no offense meant, not aimed at any person in particular, just a general statement.