What has been true since time immemorial is that entrenched determined defenders can inflict multiple casualties on attackers for every one that defenders suffer.
So, reports which say this are entirely believable.
Reports which say something different, such as, attacking Russians are inflicting multiple casualties on Ukraine for every one Russians suffer -- that we would not expect and would want to see more evidence of.
Yes, there are exceptions -- for example, when Ukraine was on the offensive last summer and took back some Russian conquered territory, they did it by breaking through Russian formations, forcing apparently panicked Russian withdrawals which resulted in massively more Russian losses than Ukrainians suffered.
But that is clearly not the case at Bakhmut, at least not yet.
No pictures, no proof.
“Yes, there are exceptions — for example, when Ukraine was on the offensive last summer and took back some Russian conquered territory, they did it by breaking through Russian formations, forcing apparently panicked Russian withdrawals which resulted in massively more Russian losses than Ukrainians suffered.”
And you know this...but what means? Biden and CNN?