This is certainly the truth. I made the mistake of publicly uploading the first couple of pics of a knife and within like five minutes, I had ten or fifteen comments like "Knife?" and "Psychopaths like you are the worst!" and "You should take this weapon and cut your own head off!" and some even worse than that. I deleted it immediately, and learned that lesson for sure.
On topic answer: when I'm road-tripping, I'll usually take anywhere from five to ten folders and slippies with me. Will I need anything other than a SAK? No. Do I want to make sure I have a selection of awesome knives that are ready for any task that might come up, that are more fun to use than a SAK?
Absolutely.