Given that every affected 737 MAX has been grounded for inspection already, this seems a bit hyperbolic. If you are still worried about some hitherto unknown new problem from Boeing, it could just as likely come from any of their airframes.
Eh... not sure about that. The 737 Max is quite new, and this is catastrophic/near-catastrophic problem 2 in a couple of years. One could be forgiven for being more suspicious of this family than their others.
Like, maybe these were the only two problems, and everything else is a perfect as could be, but at this point it's not ridiculous to be concerned that it's just a shoddy product.