48000 relatives is not necessarily 50000 missing soldiers. There could be 4 or 5 relatives for any given missing soldier. It’s foolish to think that there is a one to one correspondence between the two values.
It is also worth mentioning that Russia is way bigger than Ukraine way more populated and therefore has more people to become soldiers. The Soviet Union was famous for stationing its troops far away from their homes. I suspect many of the missing soldiers went back to their homes without telling anyone. So don’t get your hopes up that Russia is suffering a huge loss of troops in combat. If attrition is the name of the game then Russia is going to win.
You remind me of Comical Ali, the Iraqi information minister who was on TV denying vociferously that coalition forces were in Baghdad while coalition tanks were moving about in the background.