Re: It's not "Rocket Science"
Face it: Russian technology for deep space launches is very primitive and little tested. Russia never sent anything beyond Mars and Venus - if not by mistake - and even then, with a very high failure rate. Russia has been always very interested in the Earth orbit for military reasons. Anything sent beyond has no military value, just a scientific one. Thereby, choosing a Russian launcher for Earth orbit may be a cheaper alternative. For deep space launches, just a very riskier one.