However, all six of your points are irrelevant to what
@Eatomus wrote, so the question remains unanswered, why won't Biden provide the weapons necessary for Ukraine to win?
Neither the administration nor any poster has provided a reason that is plausible or rational. Rather, like the administration, they attempt to dodge it. It doesn't matter what Trump would have done, what Trump didn't believe, or even what Biden and NATO are "attempting to do". The entire question is what should we have been doing since the war started and what should be doing at present?
I don't expect you to have that answer because even the administration cannot explain it in concrete terms. They either use a strawman (e.g. on the issue of the planes), handwave about 'what Ukraine actually need', invoke some strange characterizations of weapons being 'defensive' and 'offensive', etc., and never explain what the point is of this branding of typical conventional weapons as either 'holy' or 'profane' is - its very, very strange.
Look, I can come up with my own lists of preferred weapons, or weapons that may not be wise (e.g. those that violate international law), but what none of us can do is read the mind of leaders who seem to pull their self imposed limits out of their ass.
The press has been a miserable failure in demanding coherent policy statements...they have let leaders shuffle about with vagaries and excuses that don't hold up.
Many have come to the conclusion that the real answer is simple: Biden, Scholtz, Macon, and even Johnson don't want Ukraine to win...they'd rather see the country fall than let that happen. They don't care if a stalemate develops where the bloodshed continues to flow, of if Ukraine is eventually dismembered. They may have some sympathy for Ukraine's people but they have more regard for protecting Putin's position as an essential. And if Ukraine has to pay the price, so be it.
In other words, they are the wests own 5th column. Weak, cowardly, and deeply immoral. Working on behalf of Putin's interests.
Sad, but it is the only explanation.