No it's not, I agree!
We seem to be settling, as a group, on £1k as being the de facto boundary between normal and boutique. Is that what folk would typically consider to be their "price boundary" (albeit no doubt blurred at the edges!)?
But it's kinda funny, 'cos my Ibby SR Premium for me is a goto workhorse bass and I wouldn't have considered it in any shape or form as being "boutique" even though it cost me a fraction over £1k new.