Just a “final” (I hope) note on big races versus small local races…
When I see these events, whichever the size, I’m just happy that people are out doing stuff and not sat at home watching tv and eating shite. I think the “big” events are good for people who are starting out as the publicity, and maybe the opportunity to raise some money encourages them to have a go. It’s unlikely that a beginner would enter something run by the local running club as he or she may well feel intimidated by “club-runners” even though there may be no reason to feel that way.
If people are out running, be it on fells, tarmac, trails or beaches, be it with thousands of others or a few hundred, then the world is a better place for it.