For PCB quotes yes, but this kind of thing can be gamed by competitors. I think this is why there isn't great price info for many brick and mortar and online shops now..
Yeah mostly we just haven't got around to it as the burning fire is always increasing capacity vs demand. Defo agree we should not require login though!
Most of the ones (for cnc and sheet metal at least) I’ve used do an estimate while you poke around and select options and then you send it for a final validation and quote.