The shelling of Ukrainian cities with missiles started right after Putin finished his speech at about 5:00 am local. Starting and ramping up the engines of Mriya might take time plus pilots are also likely living some distance away, plus fueling, plus flight plan, et al. Well... noone could imagine that a civil plane will be the explicit target.. and noone expected such a turn of history and all the non-millitary directed violance and destruction of civil building and infrastructure done by Russian army.