It can be useful at home for parents with kids as well. A decent number of people use Pi-hole, NextDNS, or some other DNS blocker service.
Either way, ultimately the result of not offering the option will more likely be getting blocked entirely, than workers being freed from the shackles of SafeSearch.
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What's even the point of DNS based safe search? Anyone can change their DNS and use DNS over https, how does DNS safe search work in that instance?
Also blocking the search is pretty weird, what prevents me of typing the URL directly?