In fact there are who systems in Russia
One is a BARS reserve which is similar (although not identical) to the American system and another is that you described, but the latter are called once in 3-5 years for a couple months to refresh their skills.
That post was rather evasive but I think you are conceding that these draftees are not serving in what we consider reserve units at all.
Our Reserves and Guard were fully trained active, and then stay well trained by serving in units that train monthly, and annually, with lots of travel and overseas training if required, many of which serve in civilian versions of their military duties, such as medical fields and hospitals, running cities and city systems (to repair and operate a foreign city infrastructure during war).
We maintain Airborne units, SEALs, Green Berets, Rangers, Armor units, Air National Guard units.
Russia seems to be just drafting people.