Yes. Picture some British parents and their child on a walk near a pond, river, canal or whatever. The child sees a swan. The parents will say something like "don't get too close dear, it could break your arm".
Swans are aggressive so it's probably not terrible advice, but not because they go around breaking people's arms specifically.
https://www.theguardian.com/notesandqueries/query/0,5753,-24...
Lovely read!
They've got a pretty savage and scary charge to them, it's highly likely they've startled more than one person in a park who've turned to run, tripped and fallen across steps or rockery edges and come out badly injured.
https://outdoorswimmer.com/coach/myth-busting-can-a-swan-bre...
The beak is probably more dangerous, or at least give you a nasty pinch or nibbing.
As I said, and supported by your link, I can't see a swan directly breaking a human bone - but they sure as hell can knock one arse over by charging and causing a step back fall over. That'll do some damge in some cases, easy.
If we play conkers with each other's bones the swan will lose.
Or at least that's the way I heard it, come to think of it I have no idea at all if that's true. Stops people killing and eating swans though. Not that many would anyway these days.
Not all, just mute swans; so not Bewick’s or whoopers (if I remember correctly)
Edit:
“His Majesty specifically owns any unclaimed mute swan in open water in both England and Wales in a ceremonial fashion. This has been a law since medieval times. His ownership is shared with the Worshipful Company of Dyers, granted to them by the Crown in the 1400s.”
https://royalcentral.co.uk/uk/king/does-the-king-really-own-...