Landmines are easy to make too, still it's worthwhile to ban their use.
I think USA has huge pile of banned weapons like bio and chemical weapons.
Hypothetically being able to digitize and compile it would allow incineration of every bioweapon but it comes with its own dilemma. The one advantage is that if it comes out of bits and into pathogens it was definitely deliberate. The disadvantage of course is that it can be printed with the right equipment.
This is not necessarily true. We are disposing of them and last time I checked there are only two sites now that have weapons and their numbers are decreasing daily.
Sites that have since disposed of all weapons that I know about.
1. Johnston Island 2. Umatilla, Oregon 3. Little Rock, Arkansas
source: my father has been doing this for 29 years
The USSR put anthrax warheads on a lot of their ICBMs, mostly because it was cheaper and they weren't as enamored with the idea that it might be possible to win a nuclear war by destroying one's opponent's weapons in a first strike, something bio weapons are useless for.