Do you think that everyone who ever released a "bullets cure cancer in a petri dish" study didn't think of that?

Whether or not they did, it's still a necessary part of the discussion.

They probably did think of that, and they did it too: Science as it is practiced in the real world. This sort of stuff is related to our whining about replication crises, careerism, etc.

But it can have its utility too, it's just more "defense from morons" instead "advancing the field". Or more neutrally filling in very predictable gaps in knowledge, like if you got something really unexpected but this stuff is all bog standard unhappy cells