Look at that 3.0 volley by the ATP player
Goes to show, high level players are never obsessed with stroke technique.
They are focused on winning matches.
I feel that obsession with defective stroke technique is a low level players mindset.
I have no idea what you're talking about here. Cannot see the volley, in question, on my mobile phone. Perhaps you can provide a better example than this.
ATP doubles players know full well how to hit proper volleys. However, they are often dealing with much faster balls than singles players are. For a ball that travels the length of a court and bounces before it reaches the opposite baseline, the ball can easily lose more than 50% of its original speed. However, at the net, balls have not lost much more than 20% of their original speed.
If you ever have stood on the court next to an ATP doubles match, you'll get in a real appreciation for how fast that ball is traveling. Can't really get this from TV or videos. Even WTA ball speeds are much faster up close than TV viewing would have you believe.
The bottom line is that these ATP doubles players are often dealing with balls whizzing by at
more than 110-120 kps. A 3.0 player is typically dealing with balls that are slower than 1/4 to 1/3 of this speed.