If I see them and it's convenient for me, I will say hello. But if they are scattered throughout the facility (a couple at the med carts, hiding in the break room, and some down this hall and some down that hall), I'm not going to play hide and seek. My point was that I don't go looking for them because between the 3 confused residents plotting their escape, and the new admit who is yelling for iced tea and the bathroom at 5-minute intervals, and the RN asking me to take 20 vital signs and do 4 showers, you all know where my priorities lie.
Unfortunately, not all preceptors are like you. When I was new, one of my preceptors spent the whole shift MIA (AKA texting her boyfriend in a comatose patient's room while I ran around getting all her call lights). But I digress.
Perhaps that CNA should not have 'yelled' at the OP. But at least now you know that patients'/residents' diets are everyone's responsibility. Another example is code status. Everyone needs to know that, too. You cannot just resuscitate someone who didn't want to be revived and just say, "Oh my bad, I didn't know." You would be in for a major lawsuit and legal actions against you as a person. You would also lose your job and any chances of getting another job.
OP: Students actually ARE a liability. When I'm in my nursing clinicals, I work under my instructor's license AND the RN preceptor's license. Meaning if I do something wrong, both of them are in big trouble and can lose their license to be a nurse. And then the hospital/site will get sued if a patient is harmed and it will be also my fault. That is the definition of liability. You probably thought I meant "annoying" or "in the way," but no. Please don't be defensive. I never said anything about you as a person (because how could I know that from one post?); likewise, I would appreciate it you refrained from making assumptions about how I am heartless and cold, just because my day doesn't allow time for me to go kiss up to nursing students.
I am just informing you the consequences of what happens when you don't know someone's dietary restrictions. It's not about us CNAs and the inflated egos we tend to get from time to time; it's about the patient being well, and having the surgery or treatment that they need.
We are here to care for our residents and make their lives easier. I personally don't come to work to get compliments, or told how I'll make a wonderful nurse someday. It's about humility, an idea that many people cannot grasp early on.
When I was new, I was very shocked that some of the CNAs came across as stand-offish and wouldn't come say hi to me. Later, when I got their same workload, I understood why. It's not that they wouldn't; they couldn't. Maybe not now, but someday you will realize it's not about you. I sure did.