you can't steer when you're not locked up either.
ABS will help when hydroplaning, but not on black ice. That's why it's so dangerous, and features prominently in every driver's license test in Canada, 'cause it's not like there's any shortage of black ice in this country.
A lot of the time, if you're on a highway and you hit a patch, whether you wipe out or not has almost nothing to do with the driver and everything to do with dumb luck.
Like I said, it's not like I'm saying ABS is bad, but if you need it to drive in icy conditions then you shouldn't be driving in icy conditions.