Does 正しいの imply "but", or is this just badly written?

It's a by-context thing, I think. The "but" is implied; however, if you left it out of the English translation, the meaning would be lost.

I think the "but" must not be implied in this case.

Type Moon must've been affected by French Bread's physics-defying magic thighs/skirt. No pantyshots at all costs-- even if it ends up looking stupid. (QOH Ayaka, anyone?)