I was with you until that last sentence. "The un-expected never happens" ?
Yep, and pigs fly. By driving suitably for the conditions, anticipating, allowing for others to do stupid things etc, you can adapt so that you have a much higher chance of avoiding trouble if the unexpected does happen. But it will still happen at some point, no-one can expect everything that happens.
However, I agree that 65-70 over a bridge on a corner in icy conditions sounds a trifle foolish.
As for the issue of disabling ABS, if you really feel you need to do it, a blown fuse and keeping your mouth shut seems the best option.