This has to be bait. Giratina-Altered might not have recovery, but it has ridiculous amounts of utility (Wisp, TWave, Defog, Roar/DTail) and passable offenses, all with a defensive spread of 150/120/120.
And at least Pech is specially frail; Giratina can be a ridiculously physically bulky or ridiculously specially bulky depending on the set. Not to mention it has Draco Meteor and Hex on base 100 instead of base 88.
And also it's just common sense: If the mon is ranked B in UUbers, it might be just a liiittle too strong for OU. Even the shittiest "cover legend", Dialga, is still better than the OU-busted Archaludon in every metagame all the way down to the defunct Ubers RU.