That was my reaction as well, particularly based on how the question was asked - it was very specifically about the Internet, not mentioning specific services that someone with low technological literacy might not associate with Internet usage (e.g. Google Maps, or Facebook Messenger) [1].
[1] https://www.pewresearch.org/wp-content/uploads/2021/03/Non-i...
My point was that there are people who are e.g. legitimately surprised when their high-speed data connection drops and it prevents them from using Google Maps on their smartphone. To them, it's functionally a GPS, not Internet-based at all. Similarly for certain messaging apps, which integrate with the phone's OS so tightly that it's not apparent that they're using Internet-based communication vs. SMS.
My larger point was that to then expect all respondents to a phone survey (on a measurement significantly linked to technical literacy, no less) to make similar distinctions unprompted is perhaps a bit of reach.