Why the likes are not allowed on groups?

This is not a issue, it's just a question, because I'm working in a project that needs the like functionality on groups, and I was thinking on create a new like for groups but I see this on start.php (groups plugin):

if ($handler != 'groups') {
        return $return;

I have modified this line and now the likes are working fine on groups. There is any reason for not using this native like feature on groups? I don't understand why you don't want likes working on this entity type, there is any bug related to this feature on groups? Can I use this feature like this? or is a better option to create a new like point for groups?