I guess I disagree in the sense that it already is, and this restriction is actually devaluing the material. Ghibli DVDs are everywhere; a lot of them are not official, and make money for pirates rather than for the studio. You can only artificially restrict demand for so long, in the digital world, and that boat sailed for Ghibli productions a long time ago.
IMHO making the movies easier to distribute wouldn't impact the quality of presentation or remove the space for artistic and sentimental engagement with the material. The fact that mainstream movies are on dvd and streaming did not destroy the market for film festivals - the opposite is probably true, in fact.
One can go about "not being greedy" and enhancing experience of the material without being precious for preciousness' sake.