The Watchers are actually a race of people, but who we're talking about is Uatu. It's like calling Captain America, "the human." I guess that might be what you call him if he was the only human you ever encountered. Their job is only to gain more knowledge, not to interfere with anything that goes on. That means they wouldn't even save a puppies life if they could. You'd think they'd at least make a puppy exception.
This is what makes Uatu so special. He actually interferes with human affairs. Most notably he helped the Fantastic Four in several battles which eventually got him banished from The Watchers. What was Uatu thinking? Did he think that The Watchers weren't watching? They shouldn't act like they're so perfect, though. There have been other Watchers who have interfered. What can you do?