No one is 3d printing ballistic nuclear weapons. Scale matter?
If you use weapons-grade plutonium as the feed stock for your 3D printer, you won't live long enough for the scale issues to stop you.
Unlike those who print guns, I don't think virologists are motivated by spite for politicians.
I don't see any reason there would be correlation in those qualities. But it's more that I think that advances in technology will eventually democratize biological weapons in ways that 3d printing have democratized the production of small arms.
Virologists at academic centers like BU are beholden to their paymasters. Grant-writing and groveling day in and day out. I'm not sure what feelings develop in that endless loop of futility.