You are correct. I could have been more precise there, but the article already is pretty lenghty.

Basically I adressed the consumer perspective, where transactions are either free or even rewarded via cashback ( which of course also has drawbacks, but the majority either does not care or is accepting them). Merchants would probably not want to speculate on the price of crypto and hence convert it to fiat immediately, which comes with fees as well. Therefore i would not think it's as viable as accepting traditional means of payment.

To your second point, I acknowledged that, if I may quote myself: "Bitcoin transactions are expensive. Undoubtedly you are able to send millions of dollars abroad for a relatively small fee."

And LN might bring a change, but I really wouldn't hold my breath for it to take BTC to the mainstream.
Thanks for commenting, appreciated!