We are only pulling the rug out from under the corrupt kickbacks and bribes to Ukrainian and American politicians if we cut off money to Ukraine.
What goes unsaid here is these billions of dollars keep funding the entire corrupt bureaucracy of Ukraine. The Ukraine government has NO INCOME except from the USA.
After the corrupt bureaucracy and connected contractors in DC take their cut off the top, which is the point of the exercise. Remember that the Russians are incompetent and can't fight a war and don't have any equipment that works so they are nothing to worry about and we just talk up a scare so we can fund the corruption.