My first funeral was over 60 years ago for a school mate who had died at 11. The class were told we had to go and be the choir at her funeral. We were sitting close to her distraught family and had been warned on no account to cry. I did cry though, it was so sad to see their distress and was roundly admonished by the teacher as we trooped back to school.
On the back of that, years later , I can’t believe it now, but I couldn't face my grandmothers funeral because I knew I would cry.
Our family is small so no further funerals apart from my mum and in laws, which of course I went to, so excluding those I have only been to about 5, my social and family circle is clearly very small. My dd has already been to about 40.
What I am trying to say is yes children can be traumatised so it needs to be thought through, carefully, but in principle I am not against it.