It's a waste of money trying to get it back on track.
People absolutely will. Boeing is literally too big to fail and people don't care enough either. If someone can have a 50 Euro flight from Berlin to London they won't mind if it's a reintroduced 737 MAX.
The people who buy carelessly for 50 Euro aren't Boeing's customers.
The people who are Boeing's customers are airlines, who pay eight- and nine-digit sums and perform due diligence. "Well, one group of customers won't care" is not due diligence. So if, say, Lufthansa concludes that the 50-euro customers won't care but the 500- and 2000-euro ones might, that has an impact on what price Lufthansa is willing to pay.
I personally wouldn't board this plane until it had a spotless record a decade in the air even if they paid me for it. And I'm someone who loves flying so no specific phobia involved.
Because their other option is getting at the end of the line for an A320neo and get delivery in 6 years (or worse)
And there's the problem for Boeing: They better make sure that no more MAX's fall out of the sky due to their fault otherwise airlines will skip the machines. What would happen with Ryan Air if they had one or two accidents like those happened? Knowingly using machines with the past of the MAX. Rage would be allo over the net, I am sure. And Ryan Air would be in a very tough position.
The 737 Max issues have been causing layoffs at supplier companies that were heavily reliant on the Max as a source of income.