It is contrived because the western powers pushed Ukraine into an unnecessary situation. If it had agreed not to join NATO, and therefore not represent a threat to Russia (remember that what counts is whether the Russian elite considers it a threat, not whether it actually is a threat) then it is unlikely that the invasion would have happened. However, the west pushed for their proxy politicians to gain power in Ukraine-remember that the likes of McCain addressed the crowds in Maidan, and consider how it would have been received if a prominent Russian politician had addressed crowds in Mexico City, urging them to join a Russian-led military alliance.)
What followed after the events of 2008 (when it was first mooted that Georgia and Ukraine might join NATO), and then the 2014 Maidan coup, which was, in legal terms, anti-constitutional whatever the rights or wrongs of it, was inevitable.
Some people on here seem to have difficulty in distiguishing between what they see as good and right and what actually happens, which is almost always the opposite of what they'd prefer. You'd think, as grow adults, they would have learned by now.