Dictionaries are there to report actual usage not dictate how it should be. I still get to say it's being used as a way to unreasonably paint positive associations on unrelated topics in the same way that the word "right" means both "correct" and also a specific political team. Yes I know this isn't new, Latin for left is "sinister" etc., but I like clarity and dislike the entire pattern this represents, even if it is hard to get away from — both with positive and negative examples — in natural language.
That said:
Democratise running.
Running.
Even with that definition, nope.
(But what it does do is serve as a further example of why the word has such broad usage as to be almost meaningless).
I think you are reading far more into this than there actually is.
This is not a new meaning and is one that I learned a long time ago, have seen widely used for decades and has an even longer history.
The word is far from precise, but it is also far from meaningless. I understand exactly what is meant by "democratize running" (though I don't think running is a good example of something that needs democratization since there aren't systematic barriers to popular adotion.)
> to make (something) available to all people : to make it possible for all people to understand (something)
https://www.britannica.com/dictionary/democratize