On;line shopping has relieved some of the crowds. But Christmas is every bit as special as it used to be.
It is about family being together in most people's celebrations, then gift giving to make it even more special. Having Christ in Christmas has been reducing in my observation, but the importance of being together on Christmas is alive and well.
Finding a person who will be alone on Christmas is important for many to be able to invite them over to share the celebration.
Volunteering and donating is higher during the Christmas season. ( I forgot my source for this)
However, you are quite correct that it is increasingly politically incorrect to say "Merry Christmas". In business it is considered necessary to wish Happy Holidays.