Isn't it a sign that it looks like only the Russians have occasionally sent unmanned capsules back to Earth.
Ok,a few NASA exception from outer space...
The Shuttle was conceived for that purpose but has only returned back a very little amout of things "made in space".
It has returned back things for re-use but that's another matter.
Europe has only returned a test capsule so far (the ARD). It's not in a healthy state, nowadays, space in Europe (nothing "space oriented" very exciting going on in Le Bourget, which is a sign, too).

Up to now, it's the way up that has been done much more often than the way down.
And we're 24 years after the beginning of re-usable space trips, still not much "made in space" coming down.

Raoul