That's interesting because better types systems would be a good way to do that too but most of these people usually push back against them. One theory could be

That's interesting because better types systems would be a good way to do that too but most of these people usually push back against them. One theory could be that they want to work with existing code but if you take Robert C. Martin as an example, he often pushes Smalltalk and more recently Clojure (which is more pragmatic since it works with existing Java code). That's something I don't understand. Were the other languages unusable when these people became well known? Is this just their personal biases?