I do believe there exist people who never look up information online. Such people must exist somewhere and thus I should not exclude them from existence. For the rest of people I strongly believe they either use a search engine, a virtual assistant, or go directly to Wikipedia. The search engine scrape Wikipedia, the virtual assistant use the search engine to find answers and Wikipedia is Wikipedia. In either case it is highly likely that one is using Wikipedia directly or indirectly.
However, the reasons for the discrepancy are different. Many articles are defended by petty tyrants, against improvement by people who know better than they do, but have less free time to spend un-reverting work. Often enough the tyrants are self-righteous tenured or emeritus professors who imagine themselves holding back the deluge as they enforce interpretations they picked up decades ago and have not kept up on.