Been good point, and no, we dont think of that slider, nor the curve, or any movement of a ball. And soft toss is great, I just dont think T work is a waste of time. Its all about focus, how you see the ball.
Some should use T work, some dont see it nessesary. Youve been around, youve been in the pro work out area, before a player is ready to hit, most are under the stadium hitting off the T, not taking soft toss.