For home users with AdGuard Home or aggressive DNS filters, you’re 100% right – misconfigured DNS/adblocking can absolutely cause random 403/429s and CAPTCHAs, and whitelisting or fixing that setup is a must.
Our post is more aimed at people running scrapers/automation at scale from servers or cloud infra, where there’s no AdGuard Home in the path and the main issue really is IP reputation, ASN, and rotation strategy. In those environments, cleaner residential pools smart rotation make a night-and-day difference, whereas changing DNS doesn’t move the needle much.