I'm not deflecting, I'm simply responding the way you do.
Deflection pushes the cue out way of your natural aim point, right? So a shaft with more endmass will push the cue out of way easier, with less shaft speed, than an LD shaft.
With an LD shaft, you need to hit a bit harder, usually with more elevation, and aim further outside of the object ball to achieve a similar result.
I can swerve and masse with any shaft, but it's easier with a high LD shaft because less effort is required. This is why masse and jump cues typically are 13-14mm, the endmass helps for both.
Ever try to jump with a revo shaft versus a standard maple? It can be done with both, but requires much more speed with the revo.