I wonder if some of the problems leading to insufficient liquidity allocation are:

1. that Bitcoin currently self-generates "yield" in USD terms merely hodling it
2. there's the perception that you can't generate meaningful yield on lightning yet
3. a lot of folks using lightning are hobbyists and earn yield in a non-monetary way (wow the future is cool feelings) so aren't motivated to seek monetary yield

P.S. Roy really knows how to communicate well - the metaphors were top notch.