If the ban is just to "prevent internal propaganda" then yeah, i'm not for sporting sanctions.
We're overestimating the importance of sport. It's not gonna be a deterrent for a tyranic government. As proven by North Korea or Cuba they can even tank massive economic sanctions for decades without giving a damn (and Russia is much bigger/self-sufficent), why would a ban from something as trivial as sport achieve any better results? It'll only affect the athletes themselves at the end of the day.
Now, I think a better argument than the one about internal propaganda was the one dcro brought up, that ukranians cannot compete in equal conditions.
Yet, if we want to be fully coherent with this criteria a good bunch of countries should also be banned for leaving others in "non competitive conditions" (Iraq, Syria, Libya, Yemen, etc). I'm not necessarilly against banning Russia if we are fully coherent with this...