Because we can make it better, even if it’s just a tiny amount. To me, that’s enough. It’s the same with daylight savings time, the imperial system (in the few places that still use it), ISO 8601 date format, and so on. Sure, every individual patch doesn’t do a whole lot, and even together the effect may not be world-altering, but I simply refuse to believe in a future where we keep these small bugs around just because we were stupid once and then were too lazy to fix them.
It also wouldn’t be starting the count at 0. But to have a coherent system with both positive and negative numbers, there needs to be a 0. Plus, you can still call the year 0 the first year. When somebody is 0 years old, they’re in their first year of their life as well.
The Russia comparison was more for feasibility, not for importance.
That’s not how physics works, but I appreciate the thought.