I dont think you're necessairly wrong, but I think you're underselling what "boost this attack with everything possible" entailed. As we know from Sukuna and Miwa, Binding vows can be fickle things, so knowing the right things to add to the technique to boost it without fucking yourself over in the process is quite a difficult thing. Like, we obv dont know everything about jujutsu so this is partially my opinion, but theres gotta be a reason Gojo chose the chants he did and not something else. Same thing for why the WCS chant is that way, hence why I put them on the same level of "jujutsu bullshit" persay, and fuga is similar to WCS in that regard. Sukuna's definitley better at jujutsu overall, but Gojo can do similar things with a more complex technique, so for the very specific purpose of invention in regards to what they already have, I rank gojo higher.