But scene isn't inherently "better" than p2p

That was my whole point, mate.
Scene caters to the lowest common denominator - 18 crf 5 ref deblock 0:0 bframes 3, etc (years ago they had even lower "standards," in fact). P2p, meanwhile, uses maximal settings required whilst adhering to the transparency with the source AND compression. (Compare same-sourced Arrow / Gotham / Person of Interest et alii of CtrlHD to scene. Difference is noticeable, even if DIMENSION isn't "bad," in and of itself.)
Scene doesn't care about quality, only (pre-time) speed and size. Hell, with all the pre-air sources DIMENSION is best scene group there is hands down, but even they aren't 100% with having aliasing artefacts from time to time.
Perhaps you mistake every random person (or group) with named releases as a "p2p group" (there are loads of those in Tehparadox, for one), but I imagine they're just unofficial and not "real" p2p groups (and I imagine you're knowledgeable enough not to do that). As I see it, p2p groups are those who get content up way before full sources even appear, possibly because they have direct ties to retailers and/or scene sources. Those who are transcoding either their releases or, on a positive note, encoding off of full BD once it's available online... well, they're something else, but not p2p.
Hell, if the above logic would be correct, my releases would be p2p, but they aren't are they... just a regular, random dude
Indeed, amidst CtrlHD, DON, WIKI and others, there are also multiple releases of the same from time to time, but in most of the cases, there is a reason for that. (e.g. WIKI is known to overcrop.)
Sorry for denigrating your language skills, your reply just caught me off-guard and I initially read it as very arrogant. Sorry about the misconception.