imo if they wanted to bite they would.
my Yellow has struck at me once a while ago, and it was a defensive strike; didn't leave a mark. it was very out of character for him, but it was late, i had just gotten home and was checking the enclosure. that behavior hasn't happened since, but i do pay better attention.
just an anecdote, but maybe they get grumpy somtimes. i would just monitor its behavior and do your best. 😀