You're right! The only fair solution is to drop Grischuk in central Kyiv; if he survives the journey to Norway and arrives on time, he should be allowed to play.

Not every Ukrainian is located in Kyiv. There are Ukrainians living abroad, that have left Ukraine, and have the ability to leave Ukraine.

Why is the standard an imaginary Ukrainian grandmaster currently trapped or engaged in fighting?

Perhaps they should cancel it for everyone because this imaginary person can't make it. After all it is also unfair that people can travel from Germany and the US while the imaginary Ukrainian can't.