What problem is Debian solving? There was already a poor binary packaging system for GNU/Linux, so why did they create another one? Sure it's easy to switch bet

What problem is Debian solving? There was already a poor binary packaging system for GNU/Linux, so why did they create another one? Sure it's easy to switch between similar systems but it is also marginal or useless. NixOS and Guix present alternative systems that reuse functional developer skills. If you don't have or want those skills then they aren't going to make any more sense than choosing Smalltalk or a lisp machine while being resistant to leveraging their respective paradigms.