You're right! Roger invented all great things in tennis.
All kidding aside, this day and age you do have to grind out some points. It's called defense. On the other hand, we did see Roger blocking back serves over 210 kph with a one-handed backhand for a clean winner. He invented that too.
Do you know definition of grinder?
Grinder is guy who tries to keep ball in the game as much as he can when he receives the serve, and waits for weak and short balls to attack them and hit winners from it.
Grinder is guy who have both offensive and defensive game, and is able to defend himself until he dont get short ball to attack it.
Thats typical Federers game .
Thats why he is so successful . Because he is great grinder. Hardest thing to beat in tennis is - grinder.