You might be being downvoted because:
Even if you are right (that they might just implement the easy ones), you don't actually lose anything by adding the clause. At worse case, you're as bad off as if you didn't have it. Not exactly a "counter-argument" since you don't actually lose anything.
As for why not just pick something else...It's hard to tell without the full list...how do you test that something can hold 600lbs? Even if there is something relatively easy, say, that sockets are X feet apart from each other...again, what's the harm in 1 additional quick check? (and if you say their reputation, I'd argue it might have helped their reputation as oppose to harm it)