Nah theres's a difference. It's like with movie leakers not actually leaking images of photos -- see the Spider-Men leaked image and the one with Daredevil that came out months ago. There's an understanding of what is off limits, and what is not.
Or to borrow a manga trope, they can overlook a certain amount. After all, spoilers could be lucky guesses. RAWS stolen from a shop? Fair dos. RAWs from the mangaplus process itself? Heck, this could even fuck over mangaplus as a service. Like, don't be sodding selfish. Blimey.
Bullshit.
It's really just an excuse from a thief trying to frame bigger thieves (in his eyes), because they stole his spotlight.
Like a small-town robber, that steals every single week, suddenly acting like a moral instance because another group had a bigger coup in the neighboring town.
The only legal thing here are the official releases each Sunday.
All the other stuff, be it redon's summary leaks, the magazine photos (that he actually supports btw) or the now leaked Shueisha raws are illegal stuff.
He can shove his double-standards back into his own asshole.