I'm regurgitating what I've read and heard, including from HN commenters so I don't deserve credit for this: Historically, the USSR's answer to Western air supe

I'm regurgitating what I've read and heard, including from HN commenters so I don't deserve credit for this: Historically, the USSR's answer to Western air superiority isn't more fighters but air defense that can move with the army. Basically the USSR army has really good air defense. Consequently, the Western allies got really good at SEAD. The Western allies rely on their fighters to gain air superiority. It's assumed that before the army even starts moving in, the fighter would have swept the skies so the US ground forces (the US Navy does because they can't rely on ground based fighters and carriers are precious) don't have great air defense in the form of missiles, etc. when compared to the USSR. As a consequence, the USSR/Russia air force did not need to have as much SEAD capabilities. But now they're fighting Ukraine who inherited the same strong USSR air defense capabilities and its been difficult for the Russians because it wasn't a capability they had needed to develop. The hypothesis seems plausible to me. Feel free to let me know where this information may be incorrect so I can update my knowledge.