And makes everything here pointless, renders the series itself contradictory to itself, and makes all mons equal in strength as well as speed by levels, as the distinction between whether or not speed and AP scale is equally contradicted and the "huge distinction" in AP is just as prevalent as the Speed difference when you take levels into account. See Pikachu vs Latios, Darkrai vs Palkia and Dialga, every battle the protagonists of the games do, the intro to Darkrai's movie, battles between Pokémon of separate stages. The list of inconsistencies in AP and Speed go on and on with "Levels". The Series portrays everything capable of possibly harming everything at random intervals and variations, with our only defense against it being an argument from incredulity (i.e. Axew doing anything to Beartic in BW is absolutely absurd! It can't be true,).
But we all smell the BS. We all know that this doesn't make sense. This is where we start to get outliers from— when feats contradict everything we understand from the series— not just because they seem absurd on their own merits (I.e. Happiny being as strong as it is, despite its size sounds ridiculous irl and I refuse to believe it's wall level— as a shitty example), but because the series itself has established concepts that these things contradict that can only be explained with levels or with the outlier excuse.
It's strange coming from me— because if you knew me irl, you'd know that I say that there is no such thing as overthinking. So I will stand by that and state that, the broader truth is that we can't know anything and that all conclusions we come to (be it about reality or this topic specifically) are based in assumptions. We assume that we can comprehend the world around us— assume that our definitions for things are viable, assume that our senses are reliable when there is no good reason for any of these claims to be true, AT ALL, and we throw away the possibility that we are right. I might be getting too meta, but, to be clear, you analyzing this deep is both getting us to the root of th true answer— and getting us both confused and nowhere. Because, like in real life, we can't know anything without assuming something and being irrational at some point.
TL
R; Your overanalyzing is getting us to the truth, but said truth is the same as not knowing. So do what I do when I walk around my house, and assume the basics of what we go by apply to a certain extent. That being "lolpowerlevels"