Having your property stolen truly sucks; I’m sure everyone that sees this thread commiserates with you.
Being analytical bastards I’m sure that there is a need to understand the circumstances. Where did this happen? Was the bike tucked away in a garage? Was the garage locked and was it broken into? What could have been done differently to prevent this or at least make it less a target?
I would guess that this was either done by professionals that would understand the need for speed and a getaway plan, the processing of the bike quick to follow. Or, this was done by amateurs that may hold the bike for a while reveling in the trophy.
I think that telling you what you should have done will not make you feel any better.
I will tell you that I have learned. I can only take steps to slow down someone that is determined, and to draw attention to the act so that there is a better chance of witnesses. I cannot totally stop a theft but I can make my property a less desirable target.
Best wishes to you and maybe getting your bike back.