Each to their own. Firstly, I’m not convinced everyone agrees football is better for the lack of heavy challenges. It’s gone much too far towards being a non-contact sport in my opinion.
Stopping the clock because sin bins encourage time-wasting? Just another way then that the flow of the game...
As soon as the argument is “it works in rugby”, I’m sceptical. Beyond being played on a green rectangle, there is next to no similarity between the sports in terms of skillset, culture and flow. That’s one major reason VAR is crap in football - totally unsuited to the sport. They promised it...
Not sure it will benefit the game very much. Obvious response to a player being sin-binned will be 10 minutes with 10 men behind the ball and not a lot happening.