What gives you the idea there wouldn’t be a test to see how high you are at the time of the accident?

I dunno, maybe the part where

If you’ve been a heavy, daily user and your blood shows detectable levels of THC (which it totally does, yes) 7 days after, you can’t drive, simple as that - that’s how the law works and the fault is on you.

If I can be stone cold sober for 7 days and fail the test, your test has absolutely no fucking clue if I’m actually high.