Easter is more important than Christmas in the religious calendar, but I don't think we should under estimate the importance of Christmas.
That said, there is absolutely nothing that the government can do to cancel Christmas. They may limit it a little bit more, but people can still celebrate the reasons for the day, even if it's in much smaller groups.
We will go to church in Christmas Eve to sing Carols in the courtyard. We won't see family on Christmas Day but we will still have dinner with all the trimmings and we will still exchange gifts. Some of that will be done on Skype so close family can be there albeit remotely.
Government can't make the decisions around personal circumstances.
If you think it may be the last Christmas you will have with a parent, then be a grown up and make the right decision and take responsibility for what you are doing instead of wanting the govt to shape policies around your personal circumstances. Noone is going to criticise you for seeing family.
If you plan to meet up with you parents, inlaws, l your siblings, aunties and uncles because you always do, then come on get a grip and start thinking of others.
If people need to travel across country to see their family bit are still sticking to the rules, then they have just as much right as you, even if your parents are just around the corner.
The govt rules for Christmas have not stopped families meeting if they have always planned to do so not matter the rule. It has however meant that more families are now going to meet and this will lead to more deaths.
Unless you can fully self isolate for a long period of time before mixing, then it is not risk free to mix.