For public understanding the officials could have spent a few more seconds on foul play, but I understand that’s not the main reason they’re talking.
The “current climate” is, I think, an ambition to do everything possible to reduce head contact. While initially I was surprised by the red card and unsure of it, there is an argument that rugby wants to retrain players’ instincts. And in this case, even assuming there was no intent to do anything highly dangerous, pushing weight forward, with a jump, and turning a hard part of the body towards another player is a instinctive reaction which is dangerous. It will be difficult to eliminate this kind of outcome but this isn’t a player running into an elbow or knee which was already there in a genuine accident - this was made more dangerous due to the actions/reactions of the England player and seeking to emphasise that this isn’t unfortunate but generally understood as part of rugby is arguably important.
The rugby disciplinary system being what it is, this might be overturned, of course!