@neauoire I guess people are lazy to change? To do something they are not currently familiar perhaps?
If you are developing new languages all the time (or you have done once and it fits perfectly), reading someone's else documentation sure will be a lot of work. Why bother learning to use if you know how to invent it?
If you are learning new programming languages all the time, having to think of all the details in making a programming language is going to be a lot of work. Why bother inventing something new if you can learn what exists?