Laugh on copyleft. If BSD was copyleft much thing would not have borned or being very different.
Copyleft is a way to prevent development. No one wants their contribution to be restricted.
Sadly, GNU is dying. musl, elftoolchain, chimera linux and much more BSD-licensed alternative is rising. The GPL viruses are losing permissively licensed, cleaner software. They have to stop spreading.
Anyone licensing their software permissively is not dumb or need to update their license. They have their intention.