You just tricked yourself. If they are in a defensive war like you said then there must also be an attacker. In all the cases you mentioned the faction attacking is armed with way more weapons being used for attack. This highlight exactly what i'm saying, which is that weapons are mostly made for attack not for defense.
cloud
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If defence industries mean the military complex then every country in the world should let that sector rotten and disappear.
In the world we live in weapons are never used for defense but mostly for attack. We have even more reasons to ditch weapons in the world we live in rather than in an ideal world where world leaders aren't corrupted politicians tripping on power
As a human being i think you have become incosistent and unreliable too. Lean history, see what's happening around you, think with your own brain.
If they are bigger than all other competitors they probably manufacture their elevators in china and profit on cheap labor. They also probably own all sort of these silly patents about pressing a button with a finger of walking at a certain angle
Steam policies are against everything linux stand for. It's a closed source third party launcher where they rent games under DRM and steal all sort of data while doing so. Valve created a small monopoly in wich videogames makers are abducted in routing their games through their useless launcher to get some visibility. They also abducted people to install their proprietary app to play certain games.
Microsoft owns github and google run android. They have worked and invested a lot in open source projects except they do it only out of convenience and it's just a fraction of what they actually do. Making proprietary software available for linux only extend companies reach.
These people are some of the biggest money junkies on earth. They are so addicted to money that they wouldn't mind wrecking everything around them for some profits. At this point I don't think they qualify to do anything good for society
Name one of them that doesn't own a company that profits on fooling and tricking people
Linux comes with a license, read that.