Job,

It sounds like WSIB is pushing too hard. Their efforts will likely backfire. Your neck needs less activity, not more. You need cognitive rest, not cognitive challenge. Go through the motions and express when you feel fatigued or overwhelmed. Maybe they will get the message.

The physio is just doing what she/he gets paid to do. They will continue as long as WSIB is willing to keep paying.

Try to keep your stress levels low.

My best to you.