You're assuming she's only stronger than most heroes at a certain level. This is false.
You're also pretending as if Fuhrer being even somewhat relative to full power Tatsumaki is correct. It flagrantly isn't, like Tats at one of her weakest and most damaged levels being able to restrain him completely before he mutated.
Also, Orochi is stated to be >> all monsters while untransformed, and Psykos admitted he has more power than even she thought. PsykoOrochi is >>> Orochi, so even pretending that Fuhrer is close to this is non-sensical.
What's more likely, that Fuhrer is in any way close to these characters, or that they simply weren't using High 6-A levels of power? Psykos looks fairly casual to me, and she warned Tats that using too much power would back fire and crush her beforehand.