You've just confessed that the MP sync is broken and has been known to be broken for a very long time and yet nothing has been done about it. I didn't know you supported my narrative, GG!
Oh a confession! I haven't confessed anything - like I said, this has been known for a very long time. The missile 'sync' consists of sending the launch signal and then each client simulates the missile independently.
As for fuzes of that era, they were as reliable as the rest of the electronics. A lot misses at that time were due to lack of training and good DLZ display/knowledge as well.