Because you aren't using "estimates" for Ukrainian casualties, you're using the numbers that have been able to be verified with evidence by third parties. In M

Because you aren't using "estimates" for Ukrainian casualties, you're using the numbers that have been able to be verified with evidence by third parties. In Mariupol alone there were ~10,000 new graves on satellite imagery and some of them are large enough for multiple bodies, which we know was done in Lyman when those mass graves were excavated.