it doesn't bother me. if you've noticed Disney often kills off the parent(s) of a main character (Snow White, Cinderella, Bambi, The Little Mermaid, Aladdin, The Lion King, Finding Nemo, The Wild, etc.). that's because that's what happens in real life. TLK and the other movies have that concept to help kids cope with loss easier. and then their movies do have to have a plot, I hate it when the make movies without villains cause it totally kills the movie's effect (FatH2). it's also the whole good vs. evil thing to show kids that good always prevails.
plus it's already been said that TLK is for everybody, not just kids. that's why it's "Delightful Disney fun for the whole family!" and it's not like that sort of stuff bothers little kids, there's no cases of anyone being psychologically scarred for life due to TLK

heck, I'd watched Jurassic Park at age 2 and turned out just fine.