> Are those programmers using this operating system's tools for software installation? Hardly. And why?

Because this is a bizarre argument. I accidentally make dependencies on specific variants of libraries because I don't immediately need to support other variants and lack examples and/or time to worry about theoretical portability.

I don't use OS specific packaging because it was intentionally written to be non-portable. My learning it is an irrational commitment to keep using an OS at the neglect of all others and even if its distributor changes (or can no longer honor) the conditions of our deal.