Is it more important to design the device to be repairable affordably or to be affordably in the first place? At $40 a pop it's hard to justify any repair on those RPis. There are much more valuable devices out there which are less easily repairable.
More important to what or whom? The immediate convenience of the consumer may have a different "more important" than the sustainability of human life on this planet as we drown in discarded $40 electronics and the byproducts of their production, that were "not important" to make non-disposable because it was so convenient to dispose of them.
