While the risk might be somewhat low in feeding large prey items, it's still a highly avoidable risk. You don't let a toddler play with a plastic grocery bag unsupervised, one 1 in a thousand will put it over their head and suffocate, but do you risk it being your kid? The rule applies mostly to younger frogs, and for prey that may not digest easily, but should still be generally followed for the majority of food items. My 2.5" guys eat full night crawlers often, and sometimes want a second one, or will easily eat 3 large dubia nymphs and have no problems. I did feed them crickets that were a bit large when they were tiny, and they did get kind of backed up, so yeah, be careful.