How can you know that?

Why do you think it would take 20-30 years of meditation to be able to withstand pain without weeping?

Are you sure you understand your own nervous system well enough to make that claim about other people's nervous systems?

Why would you imagine that I, in particular, have a similar pain threshold to you?

Or that I haven't experienced pain on par with your own?

I'd be more careful assuming yourself to be an authority on the experience of others.