“if at all possible” you meant, not “necessary.”
Yes, that’s an option too. However, depending on the amount of products (have one store I manage that has several thousand), it’s still not practical. If you have it load to much WP and/or your browser can slow to a crawl or even crash. Keep it to a lesser amount, and you’re still having to repleat the process over and over.
As I said above, it’s certainly an option, and its a good option if you really want to avoid using a plugin and don’t mind the extra work and remembering to turn off comments/reviews on every product. However, the simplest, easiest option, from an admin/sho- manager standpoint, is the plugin I recommended.