But how many people connect exclusively to nodes run by "well known bitcoiners, devs etc."?
quite a lot. For example, if you use Blixt wallet (that is a full LND on your mobile), is using neutrino with by default Blixt node. Same for Breez. But if you remove from settings that default neutrino node, it will get any other available neutrino node in the network. And most of them are those well known nodes, serving blocks for the public. You can set also your own node if you want and you have it activated with neutrino.