Is that true tho ? I think that's what puts the Mc's potential way beyond anyone else's, I mean, first, we already have two templates that show us what the Mc's paths forward could lead to.
First template is coming from Ella, she represents what the Mc could achieve in regards to his Body traits, her powers to shapeshift countless times depending on the situation, her incredible control and knowledge of Body, and her abbility to manipulate and shape matter and infuse other beings with her powers ( as she did with Duncan ). With her powers of shapeshifting she was able to brifly withstand an attack from Malik, she was able to dodge Nico's portals due to her heightening her reflexes to the absolute peak, and the Mc briefly showed the same when he resisted Aos's teleportation.
The second template is Sylla, honestly the Mc said it best, it would be insane if he could do half the technniques she pulled, from teleporting enemies in the Dream world, I mean Mc in his fight against level 4 Cole did this briefly, Scylla on the other hand teleported Indra there for the entirety of their fight, then there's making enemies forget their actions, to connecting to other souls and calling them in battle etc, the possibilities are endless.
And the cream of the crop ofc, is that unlike Sylla and Ella, the Mc can combine these since he has both traits, he could connect to a soul with his Memory, and replicate their biology with his Body.
Honestly sorry to say, but I categorically disagree with you, whilst everyone else is bound by their specific ability types, the Mc is so versatile in his potential it's insane to imagine.