A couple of my mates ride bicycles and good on them .........
BUT
I wonder how I would go driving my car on a road at 40 Kph (and you bike guys know that is a bloody good clip on a pushie

), taking up the whole lane as I am entitled, but holding up traffic on a 60 or 80 kph road?? Highway patrol might suggest (for our safety of course $$$$$$$$$$$) that I may drive a little more responsibly after I receive my infringement notice for obstructing traffic - however, if my my buddies and I form our "Tour de delusion" - 5 wide pellaton (?) then that's okay because we are bike riders and we are special !! Pffft I say - get off my damn road
And before all the greenies jump out of their tree and all puffed up - I ride a motorcycle and know only too well that car drivers only watch their speedo, their phone keypad, or their maccas they just bought
To me, if you can't match the flow of traffic - don't be there - or better still, get rid of the pushie and burn fossil fuel on a motorcycle !!
End of rant
Cheers