Your read way too much into it, your naïveté was simply being pointed out. There was no such implication. Part of good customer service in the US is pretending

Your read way too much into it, your naïveté was simply being pointed out. There was no such implication. Part of good customer service in the US is pretending you're really really happy to do whatever it is you are doing for your customer. "It is my pleasure to serve you." The staff at Texas Roadhouse wear shirts that say "I love my job," for crying out loud. It's extremely unprofessional to complain to your customers so you're going to put a positive spin on everything. Doubly so if you are really jonesing for a tip. If I were in a customer service position and my customer asked me how I liked my job I'd tell them I loved it, no matter if it were the truth or not. I'd lie through my teeth because its my job to be positive, not honest. That's not to say you're always going to be dishonest. It's just like when a stranger asks you "how you doing?" You say, "good, how about you?" Even when you're miserable. It's just a social nicety people​ do and has no bearing on how someone is actually doing. Pointing that out isn't implying that every single person who says "I'm doing good" is secretly miserable.