If I was recreationally using them and rehab was a 'necessity' to keeping my employment, yes.
Unrelated but a mate of mine is a teacher and had a black out while teaching the morning after a big night out on the town (party drugs inc.). When dragged in front of the school authorities to explain himself the following day he used prescription med addiction as the reason because he's on anti-depressants. They 'highly encouraged' him to rehab (despite what was a lie) and after a couple weeks he was back in the classroom, at the same private school.
In my experience, plenty of companies will sweep it under the rug because its too difficult to manage a dismissal. Different story for a public figure and obviously depends on the culture of the organisation.
btw I'm not saying Ezra does or doesn't have a drug issue, but the rehab move stinks of PR by his management and the club.