Don't turn it into an ageist thing, unless you are particularly old, there will be plenty of older developers that also don't understand this.

It largely comes from understanding _why_ reproducibility is a good thing, and there are _lots_ of open source maintainers that understand this that are likely "younger than you". The vast majority of developers though focus on other things, that SQL injection attacks are still a thing indicate that we as a community have a _long_ way to go on the security front.