Does anyone in the pro ranks even use the word “pusher”. Seems like a dumb categorization that rec level folks came up with and seems to be unique to rec level tennis jocks. In most sports there are defensive amd attacking styles of play. I have never seen a negative connotation associated with a high level player or team playing a predominantly defensive style.
Lots of HS and even college powerhouse teams are built on running and defense than throwing the ball. No one has ever docked any points off their legacies for that.
you surely don't follow the football in Europe
while some people like the tactical satisfaction of defense, in particularly the famous Italian Catenaccio, if you look at fan bases, teams with attacking style have more fans and followers
and then you of course have complaints from everyone, players, coaches, fans whenever a Catenaccio style team wins any major trophy