If NATO wants to think of it in purely selfish terms, try this, Ukraine is more battle experienced than any country in NATO right now, they're the only country who has fought modern day Russia and lived to tell the tale, what other country in NATO has recently fought a global superpower? Collectively invading countries far weaker than you to deal with some terrorists isn't the same thing at all.
The West told Ukraine in fear that they would be crushed in days and to evacuate, they were wrong, embarrassingly wrong, Ukraine held. Ukraine proved them wrong. We were wrong. We aren't the Gods of military tactics and understand absolutely everything, The West achieves victories through air supremacy but without it they don't know what to do and expect Ukraine to achieve miracles without air supremacy.
But Ukraine still holds against impossible odds. Many countries would crumble without air supremacy. Ukraine doesn't. Their knowledge is vital, their experience is vital, Ukraine is vital to NATO's security and an ally that would repay us tenfold but would only be capable of repaying us if we don't let them turn into ruins through fear of sending things, fear of taking hits to our own military, etc.
