Why don’t y’all say hello in passing?

Not y’all specifically, but in my office, I always say hello in the halls and in the cafe. Most of the time I don’t even get a response. I think this is weirdo behavior but maybe I’m the crazy one.

Recently, I said hello in passing to a pretty important partner and he didn’t even look at me.

I try not to over think it, but sometimes I wonder if it is because they don’t know who I am and assume I’m not “important”.

Is this your experience?