It doesn't happen at my house, either. It never has. When my children were young (but definitely older than toddlers), there was a tradition just for a while that the kids and I would split the work - they would decorate upstairs and I'd decorate downstairs or vice versa. There were four of them and one of me and I thought it was a lot of fun. But they grew interested in other things, so it didn't last. And they couldn't reach the top of the tree well, so there was a "tree line" on the Christmas tree. I should have taken pictures.
Perhaps when your children get older, they'll like to help. Until then, don't feel deprived. Your husband may be intimidated because you're so good at decorating (and do so much of it). He may be thinking, "Well, that's HER thing." And maybe it is! That's fine!
I don't share my husband's passion for going to football games and sitting for three hours in subzero weather watching a bunch of grown men knock each other down. That's his thing. I try to keep positive about it, but I'm not very involved. Translate that to decorating.
Ask your husband if he'll put up the tree for you. If he will, let HIM do it - don't tell him how and don't help unless and until he asks for it. Not that you would do that! Ask him if he'll do the lights (but if he does, don't criticize the way he does it). If he doesn't want to do anything else on the tree and you do, that's all right. That's your family tradition. You share it with many other families!
Now, Christmas cookies... maybe that's something the whole family can do together - or driving around looking at everybody else's lights.