So is it not really true that MP rackets can help with consistency?
It depends on the frame, the string, and the player.
Give a low to mid level player a powerful MP frame with powerful string and he's NOT going to be more consistent. On flat shots the deflection angle will be more INCONSISTENT and he'll lack the skill to hit with accuracy inducing spin consistently.
Even if he can hit with topspin or slice to bring some accuracy to his shots he won't be able to consistently exploit the more spinny nature of the MP since he lacks the court time needed to develop the timing.
Basically the argument folks are making here is that if you're a lower or mid level player you should use a larger string bed which is inherently less consistent compared to a smaller string bed, all else being equal.
Where a larger string bed MIGHT help is if it's denser (18x20) and with a less powerful/stiffer string so the rebound angle is more predictable, especially on flat shots. Then you have a larger surface area to strike and it's more predictable and doesn't rely upon spinning the ball for accuracy.
I've seen too many rec players tentatively tapping balls since their frame is so powerful AND large/unpredictable. The ones that know how to hit top spin are as likely to shank as hit a clean, consistent ball.
You veterans know what I'm talking about. They're the guys on Saturday morning hitting HUGE spinny forehands...in 2-3 shot rallies. Then someone launches the ball into the parking lot or into the net.
Yeah, their 100" Nadal racquet might be marginally more spinny than a smaller frame. But while they can hit the spinny shot they can't do it consistently. The ladies on our mid-level mixed team are always complaining about our line 1 men who hit like this: looks REALLY impressive but they often inflict more UEs and score very few winners.
I'm always in danger of being in that category with my Speed 300. Given my experience and skill I can certainly rip big top spin forehands. But under match conditions I need to be very carefully about WHEN I do that. Where others using an MP will try that with every ball I'll do it only when I'm most comfortable with the ball in my strike zone and my feet/shoulders set. Since I can hit that sort of solid top spin shot even with a mid while well prepared I'm thinking I should return to mids since, under match conditions, one is forced to hit so many shots when not perfectly prepared.