I was not suggesting it's only linemen. I think my point still stands about NFL being all about 'set plays'. NFL is all "set up, set up, set up, RUN, TACKLE, STOP", whereas rugby is more "run run tackle run tackle run tackle stop".
Combine that with the fact when a Rugby player makes an extended run, they aren't often tackled directly head or side-on, it's more perhaps an "anchor" tackle from the back to pull them down. In american football, the safeties and deep players have more opportunity to get head-on with a receiver while the ball is in flight, while a rugby full-back having to watch and run horizontally while the player is running means they are less likely to be directly head-on.
Further combine that with the fact that Rugby governing bodies have penalised 'high tackles', and the rate of CTE drops significalty.
>I think my point still stands about NFL being all about 'set plays'. NFL is all "set up, set up, set up, RUN, TACKLE, STOP", whereas rugby is more "run run tackle run tackle run tackle stop".
Is your core argument that rugby is safer because the players are more tired at any given point so they don't hit as hard? Other than that, I am struggling to figure out the mechanism between stopping more frequently and football being more dangerous.
>Combine that with the fact when a Rugby player makes an extended run, they aren't often tackled directly head or side-on, it's more perhaps an "anchor" tackle from the back to pull them down. In american football, the safeties and deep players have more opportunity to get head-on with a receiver while the ball is in flight, while a rugby full-back having to watch and run horizontally while the player is running means they are less likely to be directly head-on.
I'd suggest you watch videos like [0] to diligence your claim that head-on tackles aren't common in rugby.
The nuance that you are missing is the power equation - American football's best tacklers focus on short-duration, high-work contact (i.e. maximizing power) to knock an offensive player off their feet [1]. Think of it like placing a nail. You can swing a metal hammer and a rubber mallet (of the same mass) against the same nail and the metal hammer will always drive it better because the dt portion of the power equation (i.e. the denominator) is smaller.
The metaphor extends: rugby players may put in the same amount of work (or more!) on a given tackle, but the dt part of their power equation is much higher than in the NFL because humans are squishy (in practice this is also why you see so much more form tackling in rugby - it's hard to generate enough power to just knock someone over without wearing pads).
Ultimately, high power hits are what cause the rapid, high energy head movements that cause CTE and those are just easier to do in pads.
Combine that with the fact when a Rugby player makes an extended run, they aren't often tackled directly head or side-on, it's more perhaps an "anchor" tackle from the back to pull them down. In american football, the safeties and deep players have more opportunity to get head-on with a receiver while the ball is in flight, while a rugby full-back having to watch and run horizontally while the player is running means they are less likely to be directly head-on.
Further combine that with the fact that Rugby governing bodies have penalised 'high tackles', and the rate of CTE drops significalty.