Two Remaining Questions: Equal Cars & Force Cockpit?

Cockpit cam makes far more sense with VR than on a TV/monitor. For the latter an in-game cockpit view is more challenging that real life due to the lack of stereoscopic vision for depth perception. The use of the T-cam view is partially to compensate for this, although I suspect it probably does go further into making it a bit easier to spot apexes etc. 

I'd agree that a feature to ensure all drivers in a race are using cockpit cam would be a good addition for those who want this.