No one says she thinks other kids are missing out, I wonder what she thinks her dd's are missing out on if they enjoy something for what it is, without a tone of amazon ordered prescribed magic.
No one is missing out. It's all just different. Enjoy it for what it is or elaborate and add things in.
Either way no one is missing out. It's just different.
You think great north run doesn't have extra sparkles? You clearly haven't done it 
Tons of people add extra 'sparkly' shit to it. Including actual glitter. They feel it makes it better experience for them.
I run in my running gear. I have no need for wings and head bands or fancy dress. But for some it's as much part of it as everything else.
Doesn't make it more or less special for me.
I was moved at Lourdes without believing. But most of the thousands there did believe. I don't believe it was more special for them or for me. Just different.
That's my point. No one is missing out doing anything differently. It's just different. An if the OPs son wants a fairy door in his room. That's fine. Not having a fairy door is fine too.
One way isnt a better childhood, it's different. If the OP was forcing a fairy door on her ds, that would be different.