In my opinion, the main message of "HODL" is not to hoard your money and never spend it. Instead, the message is "use Bitcoin with LOW time preference".

For an inflationary currency like USD, it makes sense to spend as soon as possible, since years later the same money will buy you less.

For a deflationary currency like BTC, it makes sense to hold as long as possible, since years later the same money will buy you more.