I don't believe that the high fees will destroy Bitcoin or lightning.
What we are witnessing are the market forces at work. Left alone they will work themselves out.
Incentives will drive the movement of scarce resources to more productive innovations, after all that's how we got the lightning network to begin with.
Will fees remain high forever? No one can know, but innovators will work around them in some clever way that is unpredictable.
When things start going in unfavorable directions there's a natural tendency to think that something needs to be done. This kind of thinking has led to our current financial mess.
Trust the market forces, it will work itself out. It just may not be worked out in the way that you like.
At least that's how I think about the problem. I could be way off base 🙂