We either don't need it, or get stuck and end up crying in the bathroom. Thing is, why do developers create software that needs administrative access to the os

We either don't need it, or get stuck and end up crying in the bathroom. Thing is, why do developers create software that needs administrative access to the os? I wish that I could simply download a zip of the software, extract it and run. And already this wouldn't work: most software is distributed only through an installer. Heck, even PortableApps website distribute their portable products using an installer!