The evidence presented to prove that a Capybara is a serious threat to a human being is being misrepresented. The claim is that
https://vsbattles.com/threads/the-rake-fights-a-capybara-2-0-0.164069/#post-6379733 "Capybaras can overpower grown adults" which is just untrue. So first off, the second "feat" is of a spider monkey being killed. That is a very small animal and I'm not sure why it's being brought up as if being capable of killing one is at all relevant to threatening a human being that's over ten times its mass. The first article linked to is an instance of a Capybara injuring an actual human being, but while the cuts were deep, it is never mentioned that they were anywhere near life-threatening. The third link is a bit more notable, the Capybara killed a dog (breed not specified, likely small) and caused a significant injury in the leg of the lady who owned it.
Overall, yes, Capybaras can absolutely injure humans, they've got huge teeth, but that doesn't mean they can
kill them (short of freak accidents, one could absolutely bite deep enough to sever a femoral artery), these instances are both people going about their day only to suddenly be attacked by an animal, as most instances of animal attacks go. Ultimately while a Capybara is a rather large creature (
https://en.wikipedia.org/wiki/Capyb...s grow to 106,are slightly heavier than males. 49 kg on average) it is nowhere near the level of strength of an adult human being and has no actual instincts for combat besides "run at something and start biting", nor are they actually evolved to fight (they can scratch but that won't cause significant injury on a human and while this is conjecture their limbs are thin enough that i suspect you could just grapple one). They're definitely capable of threatening you but they won't be killing an adult human being who's actually ready to fight back.