Why sir Tim Berners-Lee use web-server to serve html document instead of other ways? [closed]

I have a historical question about why Mr. Tim Berners-Lee uses a web server? I mean he can send HTML in different ways like Peer to peer ( for example like ARPANET ) or send a zip file of HTML via email... but why did he uses a web server when he worked at CERN and what's logic behind it?