No single language is ideal for all tasks, so often new languages get invented in order to optimize for a particular sort.

Developing a new language is a significant investment, though, so it's natural for companies that do so to want to commercialize it and get it used by as many people as possible.

>Instead of delivering the value and focusing on the task, on the product we spend half of the time just learning yet another new super puper technology.

You shouldn't, in the vast majority of cases. You should choose the language that is best suited for the task at hand and use that. Chasing after the new & shiny is tempting (it's fun!) but it rarely actually makes engineering or economic sense.