I think its more than a nagging feeling of "what if something comes through". Realistically, work output in our field is notoriously hard to measure. Having an unproductive year or two or five is not really grounds for dismissal, generally.

However, no-showing, visibly walking in hours late or leaving hours early, being unresponsive on slack/email are easily observed and the type of things that stick out to accelerate your being fired.