And that one hit of weed will impair you for at least 10 days.
Some employers are dicks. Employers in an 'at-will' state can fire you for looking at them the wrong way. An even-handed employer would look at the test along with the rest of the picture, If you tested positive, but have been a model employee, productive, timely, etc., you are very likely not going to get fired.
But, employers should have tools available to them to catch the ones who are coming impaired and posing a risk to others. Do you disagree with that notion? If so, why?
There you go, assuming facts not in evidence.
Are you seriously arguing that employees never go to work impaired ever? Really?
I'm seriously arguing that a piss test is not evidence of impairment.
An argument that you have yet to address.
I have addressed it, you don't like the answer.
Employers are risk averse.
ECH claims there is a reliable test for impairment, if so, then hopefully employers will use them when it is legal. Until all employers get there, they have to use the tools available and make their best judgement. Would you want to be responsible for someone who tested positive and caused a workplace accident that claimed another life?
Or are you going to keep skirting that issue and pretending it doesn't exist?