Because of what we were talking about Strength. If you listen to Trumps and other republicans are starting to follow suite, they do not want wars. I believe at least trump means it, if nothing else but the legacy of not having them start the first term.
It doesn't weaken no matter who's the president
Putin was already building up his military in Crimea.
It takes years of preparation.
It's inevitable war that beyond any US president control
It's unfair to blame Biden for this