Wow... Have not seen this in a while. The writing below is just my personal opinion.
Even though the 737 is a very reliable plane, it still has its issues. In the 1990s, pilots lost control of their 737s due to a sudden movement of the rudder. This caused a crash that killed a total of 157 people on two aircrafts. The reason was a design flaw which could cause uncommand movements of the rudder. So this could be a similar story for the 737 Max 8. Since this is a fairly new aircraft, the investigation could uncover new design flaws that were previously unknown to Boeing. In my opinion, every crash improves aviation safety, and the main reason why air travel is so safe now is because of all of the accidents we have had and learned from.