bad swing or bad strike?

Had many examples this week where I had to explain to some of my players who were wrongly diagnosing their bad shot. So the scenario is this, one of my players started to develop a shot that started relatively straight but then faded off to the right. My player was convinced his path had moved left (out to in) and wanted to go about making swing changes to adjust the path.
I got him to hit some shots while my Trackman was collecting some data and low and behold, the club path was +1 (1 degree in to out.) My player confused, I reminded them of just how influential gear effect is (strikes not hit from the centre of the club face) and that it can undo and negate any ball flight laws struck under normal conditions.
After spraying the club face, low and behold the impact point was roughly 8 dimples to the heel side which was causing the spin axis to be tilted to the right. By drawing attention to centreness of strike and not a swing change, instantly my players saw an improvement in the flight and curve disappeared.
So my point is this, make sure before you start ripping your swing to pieces, make sure you rule out contact as the issue otherwise your swing changes could all be for nothing.