"Exchange = lightning hub" is a flawed perspective. You do not irreversibly send Bitcoin to a LN hub. Without going into too much detail, you basically lock up an amount of BTC by opening a payment channel. But they are still your Bitcoins. Yes this is an on-chain transaction, and you have to pay a fee. Then you can make offchain transactions via LN. Within the LN you create valid transactions but you don't publish them to the BTC blockchain. Once you publish the last valid transaction to the blockchain, the payment channel is closed. And this again carries a fee.
It's
analogy and it's not "flawed perspective". On the point of user view it's the same. The main position that nothing will changed for regular users only
complication of coin :
1. "opening a payment channel" = You move your bitcoin to exchange and have one onchain transaction like at LN = you open your channel.
2. "But they are still your Bitcoins." Yes, on the exchange it's the same: "your bitcoin", but exchange can request KYC from your to return it or can return ZERO for you for some other reason. But it's still your bitcoin. The same lightning hub can request KYC from your and send you back less amount that your expected to receive. All the same as on exchanges.
3. Within the LN you create valid transactions but you don't publish them to the BTC blockchain. == The same you do on the exchange. You make valid transactions offchain on the exchange, but don't publish them on the blockchain.
3. "Once you publish the last valid transaction to the blockchain, the payment channel is closed" the same will be happen when you will "close you payment channel on the exchange" with bitcoin wiredraw function. At the same moment you will receive onchain transaction. Like checkpoint at LN.
Conclusion: almost the same as exchange. Will not help
Conclusion2: when
(and IF) ppl will discover the truth about SegWit, RBF on Core Bitcoin(BTC) and LN.
On such situation BTC price will drop significantly without any odds to recover, Bitcoin name will receive other coin with original bitcoin vision. all other coins spoiled with segwit will also drop down or die. The chance will be for not spoiled coins who develop on the road and vision from original bitcoin whitepaper .
p.s. And this I have not yet written about the pitfalls of never announced LN, but described at developer whitepaper. I.E. Do you know that at some cases if user will go offline suddenly by network failor or so when he use LN, then he will lose his bitcoins? Amazing technology
Good luck with all of that
We trust in decentralization, full control of our money and simplicity