If you call “toxic” and non biodegradable “political”, I agree with you. I think you will find that countries that expect the fighting to be largely in their backyard selected Tungsten and the countries that fight “overseas” selected Uranium.

And yet all of them also selected lead for their infantry weapons, which is similarly toxic.

Ah, yes, because all lead bullets turn into a thousand degree cloud of dust, which you can later accidentally inhale or adsorb through your skin decades afterwards.