But that’s not what TypeScript does. The joke in the meme doesn’t really even make sense.
A better analogy would be you have a basket that’s explicitly labeled “Fruit” and TypeScript complains if you try to put laundry detergent in it because you said it’s supposed to be a basket of fruit.
This meme was clearly made by someone who doesn’t use or understand TypeScript.
I don’t know about firstest, but he was definitely firster. That’s why they call him a founding father, not a founding fathest.