I mean most pro-gun arguments boil down to “guns are needed because the only thing that stops a bad guy with a gun is a good guy with one”, so when a large proponent of this argument is thrown into a situation where he could be the “good guy with a gun” and he instead runs away because he values his own life more than protecting the lives of those around him, maybe he should stop and dwell on that thought for a minute.
Would I charge headfirst into gunfire? Absolutely not, and thats why I advocate for more gun control.
My assumption would be that he hoped he could at least become a martyr for the Russian people. It is one thing to be accused of crimes, and flee your country forever, it leaves space for Russians to think “well if he is an innocent man, why is he on the run? If he wishes to represent this country, how can he if he flees it?”. Maybe he hoped that by coming back and facing the ridiculous charges, it could at least give him some credibility with the citizens who would maybe see the absurdity of it all, and maybe spark some kind of political unrest. It obviously didn’t work, but in the face of the hopeless political situation in Russia, can you blame him for trying?