Nonsense. This plane right now has two out of about four hundred that crashed, which for a new plane is more than enough reason to hit the 'pause' button for a bit until we know or least think we know what went wrong.

Thinking like that does not result in 'suspending any beneficial activity with any possible risk', it just suspends this activity with a roughly 0.5% risk of incidence until the causes are clear.

There are plenty of other aircraft in the world, also many non-Max 737's.