but in this case IF the windshield did shatter and the pilots lost control, it would then be an emergency!
A windscreen on one side probably crazed over when a layer cracked. It is insulated from at least one more layer from another load bearing layer, happy to carry full load itself. Unknown for both, or more, layers to 'shatter'. So, the windows on one side had restricted vision- good idea not to continue. Absolutely not an emergency, and no implications for a more serious failure. It is a frequent occurence, and happens because of the stresses in manufacture, and in electrical heating. These things are not like car windscreens, and cost horribly too. Not a problem.
Why would the pilots lose control? Are you talking.....about......their...er........bowels? Why?