[wp-hackers] Network Installation for multisites

[Utkarsh Dixit]

While installing the network it is asked of a user to add the following
lines:

define('MULTISITE', true);
define('SUBDOMAIN_INSTALL', false);
define('DOMAIN_CURRENT_SITE', 'localhost');
......

in the wp-config.php and also various changes are required to be made to
the .htaccess file.

I'm a little curious as to why can't these changes be made automatically
using file handling in php? Is there some specific reason for not
implementing it this way?
( Currently using version 3.8 )

Thanks.