I follow motor sports to an extent, but don't feel too enthused about watching computers race each other (no matter if on track, or virtually), but it would further diminish the “racing” part of it if the machines actually told each other what they were up to next. A more humane way of driving might be more spectacular.
If they communicate so it's all a choreographed dance, then that's stupid and the sport is nigh unwatchable.
There's a reason "best crashes" videos are a whole genre on Youtube. The danger makes motosport interesting.
Typically the rules of racing will say you don't block faster cars or deliberately drive dangerously, etc. e.g. Forumla 1 says:
https://www.formula1.com/en/championship/inside-f1/rules-reg...
But yes, this Roborace thing seems pointless unless the cars are made by different teams and have different software, etc.
Done right, I could see this event being quite spectacular. Vehicles could take bigger risks, and reap bigger rewards (and bigger crashes).