Running LN hub isn't even profitable even if you're "giant" hub, because
1. LN client will automatically find best route (shortest hop / cheapest routing fees)
2. If you set high fees on your hub, some people would rather open new channel or use altcoin
3. Cost to open & close channel, unless you make user pay for it
The solution is simple,
Bitcoin needs to make a code change that requires all LN Hubs to run a FULL NODE.
Not the scaled down nodes, like many use, but True FULL nodes with the Full Blockchain stored and letting new users sync the entire blockchain from them.
Sounds simple, but the biggest question is "How to verify LN hubs run true full nodes"?
Send hash of all blocks?
Send all block headers?
Ask random "old" blocks?
Ask random "old" transaction (assuming
txindex enabled)?