Earlier quoted context omitted.
You can happily set the autopilot speed to above the speed limit. There are a few gotchas and it won’t always let you, but in general, it is fine. I normally set it to 10% higher than the posted speed limit as an example.
You intentionally wish to drive 10% higher than the speed limit.. So, you desire to be in car crash? Also one at faster speeds and therefore exponentially more deadly? Everyone has to use public roads, not just you. You are endangering all other diligent road users with your behavior, not just yourself.
You can be driving below speed limits very unsafely (and above them safely) and the constant focus on speeding, especially via automated mechanisms like cameras at the expense of traffic officers means we risk a much lower standard of driving and much less safe roads.
Note though my concern is not the crackdown on those who flout the law and/or break speed limits; but the misunderstanding of what unsafe driving is (as implied by your comment), and headline anti-speeding measures that are used to reduce costs and increase risk.