That being said, I don't think most would consider driving 120 mph while snorting coke an essential liberty. The OP makes a much more reasonable point which you refuse to address.
This isn't an academic argument, either. Just look at the gun debate in the US. Many argue that any curtailment of the right to bear arms, from a pistol to a bazooka, is an infringement of essential liberty. Many others strongly disagree that the right of individuals to own high-powered firearms is an essential liberty.
It's a matter for debate what liberties are essential and different people believe different things.
Your example is not one of "liberty", at most can be one of "licence", and surely not of "essential liberty".
While debatability is normal, that in this context of liberty the point of discrimination is "how and how much one's action affects others" - akin to the dialectic between "freedom to vs freedom from" - should be a trivial point, and at the same time is evidently something not clear in many.
Categorizing "speedracing under an influence" is not a hard exercise.
Edit: I am also seeing - and in the past 18 months the evidence has boomed -, a widespread inability towards the judgement of "why this policy", both in the affected public and the issuing power, including monstrous faults deviating from straight reasoning and display of shallow arguing (not even any more explainable by electorate positioning). I have seen a boost in lack of judgement. This is very ghastly - it is a return to the famed quality/quantity of discrimination in times of witch-hunting.
1. This quote is frequently taken out of context to mean something very different from its original intent.
2. More importantly, we give up a little "Liberty" for a little "Safety" all the time, it's basically a primary purpose for any government. I mean, should I be able to cruise down the highway at 120 MPH as I'm snorting a line of coke? Liberty-vs-safety tradeoffs are nearly all the tough calls in government.