No, this won't come into play. The Supreme Court has upheld the fact that Parliament can create criminal offences where the gravamen, the very essence of it, is impairment. If someone were to say, “Your Honour, I can't be held responsible for driving while impaired; I was too impaired,” wouldn't make any sense in the case law, and this is pretty clear.
On October 20th, 2022. See this statement in context.