The Buck 110 has a unique distinction, in being the first and most popular lockback folder ever made. Combine that with the exceptionally 'beefy' feel of the handle (even more so, in early versions of the knife), and it's not hard to see why people assumed it to be indestructible, and treated it accordingly. Hence the 'reputation' for broken tips. I think modern framelocks are viewed the same way. People assume them to be unbreakable (and even marketed as such, sometimes), and abuse the you-know-what out of them. Every time I pick one up (or a 112), that beefy handle just screams 'TANK'. It simply feels like it's supposed to be used with some 'muscle' behind it.
Having said that, it's still simply a knife (not a prybar, screwdriver, etc.). Use it correctly as such, and you'll never have a problem.