You can prove that the moment she awoke the seal her strength increased? Sakura base from the beginning of the war has no feats, and scale to MHS + as far as I know next to the Naruto base. So her just woke up the seal, and even without using it yet, her physical power was multiplied to the same level that KM1 does with Naruto? you see, this is exactly what you are proposing, that the simple awakening of the seal made her rise from MHS + just like the Naruto base to the same scale as the Naruto KM1...
I'm not underestimating anyone, I'm just pointing out something logical here, Sakura in the course of the war was fighting, healing people and wearing herself out, and she practically ran out of chakra once help with Obito with the portals, and even then she was able to dodge a attack by Kaguya that Naruto and Sasuke had difficulty, and on top could hurt her? Do you really think that from the beginning of the war until the fight with the juubi she went from the level of the base Naruto to the level of the Naruto KM1 just by awakening the Byakugō? And do you also think that from the fight with the juubi to until the fight with Kaguya her was from the level of Naruto KM1 to the level of Naruto Rikudō? That is exactly what you are saying. Ignoring her being at the level of Naruto Rikudō, following her line of thought, it is as if saying: "She dodged and hurt Kaguya, so at least at the level of Naruto KM1 she is", this is false, the difference of Kaguya to the Naruto KM1 is huge, having his level not enough to deflect and hurt Kaguya, that sounds more like a fallacy.