I think the key difference here is that it enabled root access to the host RouterOS, which is generally not something that RouterOS permits, enables, or allows.

I think the key difference here is that it enabled root access to the host RouterOS, which is generally not something that RouterOS permits, enables, or allows. It's why the word "jailbreaking" can even be used in a RouterOS context - it's similar to jailbreaking iOS or rooting an Android phone, where the end-user is NOT meant to have root access to the device.