By
not playing the grappler's game I thing Jerger is talking about the striker being highly mobile and maintaining range so it's harder to shoot in on him. I don't think he means standing upright and just boxing even at a grappling range. So I don't think you guys are really saying opposite things here.
And, you are absolutely right about the "stand tall with your hands up throwing punches" thing not being wise. Back in the 80s and early 90s Our Wing Tsun group took that dubious approach against shoots and whenever anyone competent shot in on them it when very badly ....for the WT guys. Went beautifully for the wrestlers though.
Their first response was to the problem was to double down on their flawed teaching, and then when that wasn't enough, then to pretty well forbid training with other styles who might really present a challenge. Their techniques worked well enough against a clumsy, uncommitted tackle half-heartedly delivered from too far away ....by one of your own classmates!
My own response was a simple sprawl. My old wrestling skills were degraded and pretty minimal by that point ...but still sure worked better than
standing up and trying to elbow the other guy in the back!!! ...See below (32:12-32:22)
Gotta love the sound effects though!