There are those on here who will blindly think the F35 is the ducks nuts and can do no wrong, also there are those who are of the opposite opinion and are just as extreme.
The fact is its a complex program with many things going on in parallel. Like all complex project management programs, they have to juggle competing interests.
The current issue is nothing more than a blip at a inconvientent time. We are not at war, the free world isn't hanging on a thread waiting for it to help us against the hordes. The piece of sh!t has had a major component failure in the engine. It is only prudent to ground it until the risk and cause is at least partially understood.
It would be complete stupidity to risk, 1) a pilot 2) a expensive airframe, when there is some unknown probability of a catastrophic engine failure.
I do believe this is not an unusual situation, in recent memory we have had A380 grounded, F22 grounded, etc etc.