Not everyone associates death with religion. Some, like me, associate it with life. Life is not possible without death so death is an important thing to talk about.
Lots of conversations seems contrived when they are first started. Nothing wrong with contriving an opportunity to talk about something, especially when it seems so taboo—witness the shudderings and use of words like weird, strange, awkward on this thread. Lots of topics of conversation are awkward. That's not an argument against having them.