Even if the fan could overcome the pressure drop of the fine mesh with adequate air volume for cooling. Without the fan intake being right up against mesh to pull air through, it would promote recirculation of the hot air back into the fan.
I'm using the Traxxas MMM mount on my 8T and have trapped above the ESC, between it and the mount then I've added a thin disc of air filter foam.
Not as restrictive and just stops any crud dropping into the fan...ESC has been nothing more than barely warm after use on each occasion with it fitted.