Just because other militaries are bad doesn't make the US military good. It's perfectly analogous in its wars of agression, and supporting it is morally bad, no matter how hard you whatabout it.
This is not whataboutism. This is how you stop tyranny.
That world does not exist. The world we are living in is a world where Putin exists. A world where a disarmed US and Western Europe would be conquered in less time than it would take you to sing Kumbaya.
I prefer to live in a world where MIT helps the US military complex come up with better missiles than a world where Putin kills millions of men, women and children in the name of "denazification".
Your position is hypocritical unless you think that it's morally good to make weapons for Putin.