Nice analysis.
Two points:

1. Missile Defence systems such as Israel's Arrow III & II, David Sling & Iron Dome & US THAAD etc are getting better much faster than missile avoidance technology can adapt Hypersonic weapons with kinetic energy (non explosive) warheads are ultimately the only way to get through such defensive systems.

2. While Space Wars might seem a bit scary, wars on the ground are much more scary because people get killed, not just machines. Perhaps its better that the war is won or lost in space and the loser can just surrender without anyone getting killed.