Still drive your car even with the hundreds killed around the world every day?
Visitors still go the USA even with the thousands dead from guns each year.
Flying is still 800 times safer than being a passenger in a bus. Should we stop busses driving on the road when one crashes?
300 deaths though tragic will not keep the MAX 10 grounded forever. The reason they crashed will be isolated and fixed and life will go on and aviation will have learnt and important safety lesson.......until the next one arises.