That was about the same time I was learning the subject. We didn't get an anecdote about cleaning lab benches with benzene but were told it was very dangerous and carcinogenic.
Our teacher brought out a little bottle of the stuff—about 50ml or so—and told us that this was one aromatic hydrocarbon we weren't going to sniff and we should never attempt to do so. He also went on to stress that carbon tetrachloride was nearly as bad and said that none of the methyl chlorides could be 'trusted' as safe and with every extra Cl atom they became more toxic.
Advice I've always heeded. If this was common advice in lab science 50+ years ago then why is it even an issue today? All our chemical tech should have been built around this knowledge, the default should have been that benzene and humans should not mix—this paper ought to be a hypothetical as such exposure should not happen.
Incidentally, around that time there was controversy about removing carbon tetrachloride from dry cleaners, owners of these operations were complaining the new substitutes didn't remove grease as well.