That's not what was said though was it? A player jumping in and breaking a leg with a reckless tackle will get a red card wherever the offence occurs.
Essentially, yes, it was. Albeit an extreme example. Stumpy tim said players should get away with professional fouls if a penalty is given. That is different to "if it's not a red card offence outside the box it shouldn't be one in it".
I would scrap red cards for professional fouls when a penalty is given - a goal-scoring opportunity hasn't been denied, it's just been changed. I would also just give a "penalty" goal (like a penalty try in rugby) when someone stops a goal by handball on the line.