Disclaimer: we still have pragmatic reason to follow the evidence suggested by our best scientific theories. I'm just poking fun at scientists in the spirit of Hume. There's no guarantee that the future will resemble the past, and even our best scientific theories are amenable to future evidence.
Fair enough, I concede that the meme falsely portrays scientists as being unaware of this limitation. But maybe that's where the humor comes in; although I don't think many people see the meme as funny. Maybe I should have used a different format...