Apologies if that in any way came across as a personal criticism or rubbishing your view. That was not my intention. I certainly agree with the point that the cross arms grip is inherently more unstable than a clean grip. There is a tendency for the bar to tip one way or another - but I feel it's manageable.
However, for me, no matter how hard I tried I simply couldn't do the clean grip. I'm not sure why as I think I have decent flexibility. In the end it was a choice of either not doing them or using a cross grip. The OP may - or may not -be in the same position.
Like you, I'm offering my own perspective. If you say that that a particular grip shouldn't be used (initially without giving a reason), and I've had some success with using that grip, I don't see why I shouldn't point that out.
Powerlifts: 500/363/573 @ 220 belt only
front squat: 403
dips: bodyweight + 176 x 4
military press: 232