It is not. The routing problem is not really a 'huge concern'; someone is going to figure out how to solve it in a decentralized way eventually. Someone who's familiar with programming or even better the process of engineering would know this. Depending on the work style, solution come while/after working (not before). He just fell for the usual Reddit troll (don't read it as a source of technical information). There's a specific kind of people in our community that will look very hard and very deep to find a flaw in anything that you do and try to use it against you.
Correct. // Routing is not decentralized
I have speculated on landmark selection algorithms using the blockchain as a random beacon, but it's hardwavy at best.
getting HTLCs working correctly is enough of a problem; once that's done decentralising routing is just the next thing to do. i haven't seen any reason to expect that totally redesigning the routing a few times will be difficult
I've proposed half-seriously that as an intermediary step everyone broadcasts their routes on an IRC channel. Bitcoin started that way...
If the majority only understood the challenges, there would be less toxicity.