(obligatory I don't know what I am talking about, but) Russia has heavy artillery with crazy range. If they know you have air defenses they will just use artill

(obligatory I don't know what I am talking about, but) Russia has heavy artillery with crazy range. If they know you have air defenses they will just use artillery shelling instead that bypasses your defense, instead of giving you bombers or landing paratroopers as targets. I think that's how most missiles have been sent to Ukrainian cities so far. I don't think deterrence was a credible option for Ukraine before.