My brother in Christ, they literally did that shit with Full Power Super Saiyan, you know? That shit we've seen Goku use against Perfect Cell to bring about the full power of Super Saiyan without wasting Ki on keeping it maintained? The entire existence of Super Saiyan Blue?!
Seriously, Toyo is godawful when it comes to retcons. And remember, people praise the Manga for this in thinking this fixes the powerscaling issue when it constantly fucks with shit we long knew and so did the Z-Warriors did.