Java is used for in real Software Applications that most MNC's rely on to run their Business. Although it might not be the simplest or fastest programming language, but it is often the workhorse powering many back-office applications.
New Programmers usually like languages which are simple to understand and write, irrespective of its speed or adaptability to high volume of traffic.
Nothing wrong with Python, JavaScript and the other favorite programming languages these days. But Java is still very much common and used heavily throughout software industry.