The opening line confuses me... The JVM is one of the fastest, well established, well documented, widely deployed platform in the world. Hundreds of languages run on it, quite quickly.
"Whether we like it or not, but Java is one of the most widely used programming languages. However, since most of the applications in Java are either too boring or too complex - not every Java developer has enough curiosity to look under the hood and see how JVM works."
I don't think the author contradicted what you just said. I guess you may be confused by the "whether we like it or not" part? I feel like the author is commenting on Java the language (vs the JVM).