A Polish job board https://nofluffjobs.com took over the market in several years simply by forcing employers to include the range when posting the offer. So there is a supply/demand argument here - at least for some markets.
The minority and underrepresented perspective is really important here.
But it takes a while to learn how to evaluate your skills against a particular company's needs, market at large and learn to negotiate. I know few people who were 'brought up [...] to stir the pot'. Talking to people, putting yourself out there, doing research and then finding a workable deal is not something that just comes as a given. But yes, privilege exists.
Having said that, in a competitive market a salary range simply makes a potential employer more trustworthy, and avoids wasting time for both parties.