>" I literally don't understand how people can even do it."

While I definitely appreciate types and normally work with the languages like C++ sometimes I do some front end JS libs and frankly do not have any mental troubles using plain JS. As for whether it is "safe" - all that matters to me if it works to specs and the customers are happy. Since I am programming since like forever I guess I've got enough discipline, common sense, knowledge and experience to produce decent code.