Earlier quoted context omitted.
You just listed all the reasons Redfin ( https://www.redfin.com ) is killing it. Their value proposition is that their agents aren't paid on commission, they're paid on your satisfaction. Their website is also very data-intensive compared to MLS sites (which create information asymmetry between buyers, sellers, and brokers due to how they're setup).
Otoh, are the very best agents going to work for rf and make less money? Redfin looks like modern KW to me. Most great agents don't want to undersell their own industry. And while there are many markets where a mediocre agent will do, I wouldn't take that chance in sf, la, Nyc, Miami, etc
Price of a service can be a form of signaling, but paying more for something does in no way mean you're getting better served.