Speaking toward 4.0 players "Think of the fastest/heaviest most ridiculous winner you ever hit. Any 7.0 pro would see it as an attackable ball"
Wouldn't you consider that a bit extreme? I mean an extremely heavy ridiculously fast winner a 4.0 player hit may cause trouble for even the 7.0 player.
Generally, I would say that statement is true. Literally, probably not.
The quote asks you to think of your most ridiculous winner, not your most ridiculous winner a 7.0 would allow you to hit. A couple of scenarios:
Last night, a strong slice serve to the deuce court pulled me outside of the alley but I anticipated well and cracked a sharp angle topspin fh that left his deuce box sideline and bounced again in the next court's ad box. A 7.0 would be retrieving at best.
Two practically identical situations; one, on the move I buggy-whip a fh down the line - and the other time, I went cross-court. Two of the harder groundstrokes I've ever hit, I'm sure. The 7.0 might attack one of those shots but not both.
A number of overhead winners I've hit (and you too, I'm sure) would be winners against ATP pros. Pros aren't superhuman after all. They're just exponentially better at every aspect of the game than you or I.
The cold water is, the 7.0 would never let me get into a position to hit any of the shots I described, the way I described them.