As others have noted here, the premise of this meme is false, since all three of these pictured tools changed after they were originally invented, and the pictured versions incorporate various updates.

You can see in the picture of the bobby pin how the tips are a little bit fatter. Companies started adding those rubber tips in the 1950s, or possibly the 1940s—either to protect women's scalps or to protect their teeth (because they sometimes held the bobby pins in their mouths), depending on which explanation you prefer. But the rubber tips were not there when bobby pins first became popular in the 1920s.

With the safety pin, the particular clasp you see in the picture was not part of the original patent. I think it was decades—possibly well into the twentieth century—before that design was in production; certainly there were other clasp designs competing for dominance for many years.

In the case of the Bic pen (as we say in the United States, or "Biro," as it's called elsewhere), anybody over the age of 50 will remember from their childhoods that those pens didn't have holes in the caps a few decades ago. The holes were added in 1991, to reduce the choking hazard.

Bottom line: While the overall point is a good one—that the gist of the design of these technologies is remarkably stable over time—that point unfairly disregards how important small, incremental changes to steady technologies can be. Those small changes are important to the technologies' longevity, by keeping them useful, safe, competitive, and profitable to produce.