I don't think they're apologizing. I think they're just trying to please their customers. This seems like a good idea to me.
I understand that it might cost ink to print out the stuff, but if you print in black and white (like I do), the price is probably negligible for printing a few pages of stats only (the maps and story don't need to be reprinted). I find this solution quite elegant myself. The option of them printing all versions themselves, where each customer would in fact use only one version, seems like a lot of waste and would mean that all customers pay much more on buying the product. I admit to not seeing where this is bad.
I think it's good to recognize when a company does something good. WotC has been the target of a lot of critism, let them also get the praise when it's warranted.
I don't know that i'll buy anything 5E, let alone convert back to 3E or 4E, but I raise my hat to this approach, in so far as I understand it.
Maledict Brothbreath, level 4 warrior, STR 16 (+2) AGI 7 (-1) STA 12 PER 9 INT 10 LUCK 15 (+1), AC: 16 Refl: +1 Fort: +2 Will: +1; lawful; Armor of the Lion and Lily's Blade.
Brother Sufferus, level 4 cleric, STR 13 (+1) AGI 15 (+1) STA 11 PER 13 (+1) INT 10 LUCK 9, AC: 11 (13 if wounded, 15 if down to half hit points), Refl: +3 Fort: +2 Will: +3, chaotic, Robe of the Faith, Scourge of the Maimed One, Darts of Pain.