Earlier quoted context omitted.
I don't know munch about investing (I do), but 50$ on a 50k transaction that makes a 5k profit, is peanuts and never stopped anyone from investing. Investing is not a sport/hobby for teenagers that rely on the daily allowance.
But you can also pay $50 on a $5 transaction. LN existing on testnet has no bearing on the real world. Who wants to tie up $50 to open a channel and $50 to close it? Small blockers are kidding themselves.
Fundamentally, Bitcoin needs some form of off-chain transaction. It is just not feasible to record every transaction in a permanent public ledger (let alone one that needs to be synced quickly enough to allow for ~10 minute block times)