ITU really got it bad here, having designated "Very High Frequency" at what we now consider pretty low frequency (<300MHz). Subsequently stacking on Ultra- Super- and Extremely-High Frequency bands before giving up at Terahertz.
In the United States for example, AM is commonly used from ~150khz all the way up into the low hundreds of megahertz. As an example, all aircraft transmissions in the US are AM and are in the ~120-130Mhz range.
I meant the AM radio broadcast band as an example of a popular use case of radio in the early days when the "high frequency" designation was made.
They are extremely low frequency compared to where most radio communication occurs today, orders of magnitude higher. Not literally ELF, which isn't used apart from extreme niches.
Every HAM I know would ridicule me if I used such wording as you did, which I feel I didn’t do, maybe your experience is different.
My reply was less in explaining it to you though, but more as being informative to others who might’ve not had the experience and thus could learn misleading information from your post.
(I’m also a licensed operator, but not for as long as you)
My point is that the basis for the designations were made in a period where AM radio was the primary use case for radio and so frequencies higher than the AM radio band are called "high frequency," whereas today those frequencies are actually much, much lower frequency than nearly all forms of radio communication.