Ok, let’s buy that for the means of infection argument.
Had the workers NOT been wearing the protective suits, just regular aprons and scrubs...that same droplet of infectious liquid would have fallen on those instead. Or on unprotected skin somewhere. And infected the worker when they changed clothes or took off the apron later on.
Specious argument at best.
But if (and only IF) that was how it got transferred to the new infected victim, procedures could have prevented it.
In West Africa, some of the infected treatment have someone designated to spray down the person who came in contact. They don’t cross a line separating those who came in direct contact.