sin bin

A yellow card is designed to disadvantage the team .. Front row is tge only position where this "player sacrifice" can occur. If you look at it another way, the penalised team are still down to 14 men, had they not replaced the prop, scrums would more than likely gone uncontested so numerical advantage would be voided anyway.

Swings & roundabouts really !

A couple of weeks ago, people were up in arms over the number of law changes I personally don't think that a Law change of this nature would impact the game significantly..

Statistically, most scores against a side that has been disadvantaged through a sin bin, have come through backs being unable to number up in defence, when a scrum is reduced to 7, generally one of the backs bolsters it up when defending in the (non-existent) "Red Zone" (as Foxy did a few weeks ago when Rob Evs got binned) !