If a person is at the intro/intermediate level that advice may be sound enough. Since they’re less likely to apply proper rules to include those ranges of IP’s etc.
Assuming it’s advising disabling it at the router/switch level and not just a per device level.
Better would be to explain: Disable this until you’re familiar with the following concepts (see cited books/material for more info)
I’m looking forward to it. Just worried that it’ll be as short as Links Awakening