Lordf*Not to mention the fact its usually played on frozen pitches unlike football. My brother came away with some impressive scars and injuries inflicted on others .
Also you're getting hit as hard as you would be in football without any protection. Being 130 and getting nailed by girls who are 200+ is pretty intense.
Play doesn't stop either. When you get tackled, there's a ruck above you which usually involves a lot of face kicking and trampling. Metal cleats are legal too not to mention. You can pretty much do whatever you want to get the ball from the other team like stripping it out of their hands. I've been elbowed in the face so many times from stripping and being stripped.
It's really confusing to learn if you hadn't grow up with it. Most people could understand what's going on in soccer, basketball, football etc even if they've never played. Rugby has a lot of things most people(at least in America) have no idea are. Ex. Rucks, mauls, scrums etc.
Rugby is also one of few sports with the exact same rules and field dimensions between guys and girls unlike lacrosse, baseball/softball, soccer etc.