Removing NSO won't limit access to the talent pool in practice because the key assets of NSO - the vulnerabilities - does not rely on people they employ directly but rather on the global market for exploits.
Currently, some blackhat somewhere finds a vulnerability and sells it to NSO and then NSO sells it to various countries. If Israel forbids such deals, then the same "someone's" (without regard of where they're located - those deals are essentially unregulatable, you might anonymously trade knowledge/PoC for crypto) will sell the vulnerability to NSOv2 headquartered in Panama or Mozambique, and NSOv2 will sell it to the same customers.
Currently, some blackhat somewhere finds a vulnerability and sells it to NSO and then NSO sells it to various countries. If Israel forbids such deals, then the same "someone's" (without regard of where they're located - those deals are essentially unregulatable, you might anonymously trade knowledge/PoC for crypto) will sell the vulnerability to NSOv2 headquartered in Panama or Mozambique, and NSOv2 will sell it to the same customers.