Lightning network is a 3rd party offchain payment system
Would you care to name this supposed third party?
I guess that ruins your theory as LN is not bitcoin only. 
Which is a positive, rather than a negative. Just wait for Atomic Swaps to kick in and then see what you're missing out on if you use a coin that isn't Lightning-enabled. This is all stuff that's going to come later, though.
The LN is going to without a doubt revolutionize bitcoin and all things crypto, but we can't continue talking about it like it's going to come out tomorrow. The LN is far from being able to process large transactions, nor is it able to process many transactions at the moment. I would like to say again that I do love the idea behind it, and I do think that it will do great things if / when it goes public and has the adoption it needs to be relevant. We must continue to stress the fact that it isn't ready for mass adoption yet.
Now that's a sensible critique. While it is technically "out", it's mostly the advanced technical users testing the waters right now. We're still very early in the adoption curve. There's a loooong way to go before any of this is user-friendly enough for the average member of the public.