This is a 23 year old article that time has proven wrong.
1) Wesley Clark was fired because he was recklessly confronting the Russians and others outside the scope of his orders. He also had a reputation as a jackass, so nobody felt like speaking up for him to the Secretary of Defense.
2) We have, subsequent to this article, shown quite a willingness to accept casualties. Many soldiers I have served with are either in the ground or suffered the wounds to prove that.
I don’t get it’s relavance to Ukraine.
IIRC, Clark was the Fort Hood Commander that loaned the APC (tank) to Janet Reno to kill those people at Waco.