Emergency?
An often used term intended to create an irrational emotive response.
I guess the suggestion is that a sudden threatening situation outside the drivers control, that may be avoided by extreme braking or a violent swerve.
Yes, many accidents both minor and major, arise completely outside a drivers control, and in very short time frame, however the response of the driver is a much bigger factor than the response of the tyres. Most drivers freeze mentally and physically.
Don't think you won't!
It's well known that sensory overload causes even very experienced and trained people to fail to enact basic responses.
Fortunately I've not been in such a situation in my 47 years and 1.5million km driving.
However I have observed many situations where other drivers have not anticipated or responded to developing situations, leading to a high risk of an emergency.
I believe that the likelihood of such behaviour rises with the confidence level of the driver. I believe that a driver who is overconfident in the ability of his equipment or himself to rescue him from an " emergency" is far more likely to find himself in it.
Maybe my life experience of driving on the oldest, crappiest, bald, perished, patched and mismatched tyres has made me a more careful driver.
A far more effective means of avoiding an emergency.