"Right, very easy."
there is a huge difference in difficulty between ability to fire a rocket at some plane and abiility to properly identify and acquire target above that
that difference has now costed life 300 people and they are not the only side to blame, the government is bombing them frequently and if they have means to respond I can't expect them to refrain from firing because there could be situation where they would get killed if they don't fire on time (however I am not sure of ukrainian SEAD capabilities)
it's a warzone with active SAMs, not the place for civilian aircraft, Ende