Why is UTC (which is not a time zone) considered a time zone in Java (and not only there)?

Question

Given that UTC is not a time zone, but a time standard (as stated, for example, here), why in my Java application I can use UTC as if it was a time zone (see the code snippet below)?

SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
format.setTimeZone(TimeZone.getTimeZone("UTC"));

If UTC is not a time zone, why is TimeZone.getTimeZone("UTC") able to return the time zone object?

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By the way, on my Windows machine UTC is in the list of time zones also (see the screenshot).

Is the statement "UTC is not a time zone" in reality wrong?