Dogs are dogs. You may think of them as your children, but that is your issue and others may not share it. Lest you think I don't love pets, I do. I just spent a few thousand dollars in two months on one of mine because of a heart ailment which will shorten his life. But now that it is being treated, his quality of life is good, it will just not be as long as normal. Many people would have just euthanized him when the crisis hit, but he is family to us, so we found the money, will sacrifice something else and paid for his treatment. Pets are valued highly in our family. Just a hair under my child. But I don't confuse them with my child.
Even when it comes to my CHILD, I never took her everywhere. Take weddings, for example. If she wasn't on the invitation, I would have never taken her along. God knows I wouldn't have brought a dog. Some people say they'd stay away from a wedding if their child wasn't invited, and here's the enormous difference. There is some remote chance, albeit slight, that if your 7 year old Susie is not invited to her Cousin Emily's wedding, Susie will actually remember it for years and say, "I still can't believe Emily didn't invite me to her wedding. That really hurt me." YOUR DOG WILL NEVER THINK THAT! Your dog will never grieve over not being invited to Thanksgiving at your MIL's, Christmas at your DIL's or the 4th of July at your cousin's. Because it's a DOG.
So while I can understand that some people feel their dogs are their children and deserve to go every dang where, they need to respect that not everyone feels the same way and some people just consider them dogs who can stay home. If someone gives me an ultimatum that they will not attend if their dog cannot also attend, then yes, they fall into the "nut" category and I will have to tell them we'll miss them this year. If you cannot bear to be away from our dog for a few hours and are willing to forego seeing family because of this issue, you have a serious problem and need to seek professional help.