Agree with your last sentence, and many of these so called security challenges are manufactured for political purposes/agendas, and can be resolved by the same politicians who have hyped the threats.

On the other hand the threat of subversion by a worthy adversary like the former USSR was very real, but fortunately we have good processes in place to mitigate that risk, and the resiliency of our democratic system also mitigates its impact. On the other hand, that type of subversion is very effective when directed against less resilient nations.