Gamer Rewrites Valve’s Steam Installer For Debian

I'm not a Debian user so I'd appreciate if anyone could shed some light on what's so wrong with Valves installer (it can't be that bad since there now seem to be packages available [0]) that made made it necessary to rewrite it instead of fixing it like the Debian guys seemed to do?

Don't get me wrong, I'm all for fixing stuff if you know how to do it but the first thing to do should always be trying to get it fixed upstream and/or by your distributions packagers. [0] http://ftp-master.debian.org/new/steam_1.0.0.33-1.html