The rate at which they are gained outside raids is not even comparable. And yes, thank you for addressing the accessibility of grade 63 crafting schematics. Crafting is an integral part of the economy, and grade 63 items are the most sought-after. Non-raiding crafters should have the same access level, because, frankly, crafting, being a part of economy, is an entirely separate pillar of an MMO.
And no, not only raiders need those things. They are used to optimize PvP gear, and it would be rather unbelievable if non-raiding PvE players, despite not *needing* this stuff for their content (but as you yourself said, you don't need that for entry-level raids anyway, yet it drops there), didn't want them. Character progression is important, no matter the gaming environment.
This reeks of a sense of entitlement.
There has to be a reason to raid. BiS gear has always been, and should be, that reason. I would actually prefer if it weren't craftable at all (though with how awfully slow ilvl 63 gear is metered out, the alternative would stink too), but barring that, it's entirely reasonable that one of the rewards of raiding is the ability to get BiS schematics.
And besides, this game has THE most chimp-simple crafting implementation in the history of MMO-dom, so catering to crafters shouldn't even rate a 0 on a scale of 1-10. Anyone can be a crafter with little time or effort expended.
The entirely reasonable reward of being a "hardcore" crafter is the credit base so doing provides. Credits make a lot of things happen in this game, and being in the top ~5% in terms of personal worth is a just reward in its own right.
And heck, open sales of 61/63 items are limited thanks to the buy-insert-extract-RE bug that BioWare refuses to address (and further deflates any sense of progression, either for crafters or for raiders). You have the ability now, if you are unscrupulous and rich, to learn any schematic that you want. Of course, anyone capable of enabling you to do that will catch on quick and shut you down, but that's their right.