This is not an argument. Serbia wasn't NATO either. If Ukraine was NATO, and NATO did nothing, then obviously NATO is nothing, we are not that bad.
I acknowledge that we can find many arguments for doing nothing. What I am saying is that history teaches us that doing nothing against dictators, usually costs more in the long term, both in money and in lives.
Except in this case, a lot was done. The only thing that wasn’t was to incentive a NATO shooting war with Russia given the next step would be the use of WMDs (including nukes). Thus in retrospect, the collective policy of arming Ukrainians with NATO caliber weapons was entirely appropriate given that each country had to bear in mind its own domestic political considerations in how it responded (which included assuring their publics, they wouldn’t be risking a nuclear war).