Edinburgh head coach Richard Cockerill says rugby's laws must ensure the safety of players without compromising the physical essence of the sport.
Leicester head coach Geordan Murphy claimed "the game has gone too PC" after one of his players, Will Spencer, was sent off for a dangerous tackle against Wasps.
And Cockerill says the sport can never be fully eradicated of risk.
"It's a game of rough and tumble," Cockerill said.
"If you don't want to get hurt, don't play the sport. It's one of those things. You want the game to be safe but you just have to go and play and accept that there are risks in playing."
Spencer was red-carded for a high tackle after his shoulder appeared to make contact with the head of Wasps hooker Tommy Taylor in the first-half of Leicester's 41-35 defeat at the Ricoh Arena.
Leicester coach Murphy was angry at the decision, and says the laws around contact with the head make it difficult for taller players to tackle effectively without risking yellow or red cards, a point Cockerill agrees with.
"I watched the game and the tackle is, by the letter of the law, probably a red card," said Cockerill, who coached Leicester to three Premiership titles.
"However, the only person who seemed to have a problem with it was the TMO. The referee didn't, the players didn't. It's a really tough one because it ruins the game.
"I'm not sure the law was brought in for that type of incident. It wasn't malicious, it wasn't intentional. For me it's probably a yellow card.
"It's a very difficult one but it did seem both the TMO and the referee were quite keen to get the red card out."
Cockerill was withering in his assessment of refereeing standards in the Pro14 following his side's victory over Connacht on Friday. He believes if the league is serious about being regarded as one of the best in the world, the level of officiating must improve.
"It's very difficult because you have four countries and you have one referee manager in charge of all of it but then there are other referee managers and unions that employ their own referees," he said.
"Greg Garner has a difficult job in managing it because ultimately he is not the boss of the referees. I'm not sure what his final say is and how he manages that.
"In the other leagues I've coached in, there is one boss for all the referees and he can manage that a lot easier.
"At the weekend when it went to the TMO, the referee didn't actually have footage of the incident on the big screen. I don't know how that works and who deals with that.
"If you look at the other leagues that we're competing with in the northern hemisphere, those bits get done right."