I think what TangentC was trying to say is that it doesn't make sense opening a payment channel with someone just to send 1 or 2 transactions. You pay regular fees for opening and closing the channel, so if you send fees only once, you would actually pay more than for an on-chain transaction. There are custodial wallets though where you don't pay any opening/closing channel fees because you will be using their own payment channels.
My assumption is that there will eventually mostly be channels established with the main sources of acquiring bitcoin for the average person. Places such as exchanges, mining pools, or payroll companies. In that way, the fee will be paid once to set up the channel to get the bitcoins to you in the first place. You then, as you use your bitcoin with people that you don't have a direct channel with, they'll typically only require 1 or 2 intermediaries. Additionally, the competition will drive down the LN fees. If I don't like my exchange's (or payroll company's) LN fees, I'll switch to an exchange (or payroll company) that has lower fees. If thee fees are too high everywhere, then it creates an opportunity for someone else to start a service that with lower fees and still earn a living.