In fact, I think that the LN is a good way of adapting to what crypto REALLY looks like:

big exchanges with customers trading on it

LN is quite well made for that, and LN links between customers and their exchange(s) is a perfect way to make the link between the customer and the exchange honest and trustless.  By using a LN channel to your favorite exchange, you don't give then coins in return for web-site IOU, but you are still master of your coins, the exchange cannot apply fractional reserve banking, and cannot put up messages like "withdrawals impossible now" and things like that.

LN is perfect for the relationship exchange-customer (which is what bitcoin and most crypto *essentially* is).  Moreover, LN would then even allow links between exchanges.  They would be the central hubs in the LN network.  So through this network, you could pay other people that have accounts on other exchanges, and this would be much more trustless than now, when you have given up your coins, and you hope that the exchanges will treat the IOU correctly (that is, that they will honour in the end, your supposed right of withdrawal).

But this is about the only way of using LN: making exchanges into big banks.  Which is, what crypto is in any case, about for 99%.