At the same time many MikroTik models are for ISP/micro-ISP setups, that have hundreds of people behind a router. An administrator machine being compromised could potentially expose many other network devices and allow tens of thousands of people to be compromised.

Of all infections, this is the type an administrator should be most worried about. Its rare, but exceptionally damaging. Most A/V tools aren't going to catch it, so unless you are monitoring all IP activity from your computer and doing offline filesystem checks, a virus like this could compromise your systems for years.