I'll let marriage slide, even though its roots are clearly religious, I agree there are other benefits to it today.
But funerals, being buried or burned, are too nonsensical for me to accept. They have clearly stemmed from superstitious religious beliefs.
And even for superstition they don't make sense. If you want to entertain the concept of a natural real afterlife, isn't it obvious that the "gateway" would be being eaten? Considering that is how life normally ends for living organisms on the planet earth?
We can't be too sure there is absolutely no form of an afterlife, IF there is a real scientific physical afterlife I am certain you get there by joing the foodchain.
It doesn't make sense that billions of animals would live and die only to miss out on "heaven" because no one buried them or burned their bodies to release their "spirits", that we agree on.
And I know, thats not what people are thinking when they bury or cremate their loved ones, but I guarantee the tradition started for some stupid superstitious reason like that so why continue doing it?
Its crazy and embarrassing. In a way we are being lamer than the superstitious nuts that thought it up, at least they thought they were doing it for a good reason, we're just like "people get buried, I don't know, whatever, just make sure slayer is playing at my funeral"