Perhaps an overly morose thought for a 34 year old
Not in the least. It's completely natural - to an Irish person anyway.
I have a problem with this, too.
And I have a problem with being buried! To me, being consumed by the flames, to leave this earth in a burst of heat and light feels right, not to moulder and rot in the damp, the cold and darkness - and then to have my ashes scattered in the sea.