That’s a philosophical question, not a scientific one, since it’s by definition beyond the ability of science to answer. It suffers from the infinite regress problem which many people invoke God to solve (the uncaused cause) but that’s not very satisfying, is it?
Yes, it’s actually huge. Especially for maintaining a weapon as complicated as an Abrams tank. If it can be repaired close to the front lines then that has the potential to cut days off the turnaround time compared to towing it over to Poland.