Mosque etiquette includes consideration for the comfort of other worshippers as well as one's own worship. Clean clothing, courteous behavior, an appropriate voice, and making room for others all express respect.
The report mentions both الْمَلَائِكَةَ (angels) and الْإِنْسُ (human beings); avoiding disturbance is therefore more than mere social polish.
Someone with an illness or unavoidable personal difficulty should not be humiliated. The concern can be addressed gently, discreetly, and with an effort to find a practical solution.