This is so untrue. Most high schoolers run a Google search for their queries first. Most of the time just looking for a Wikipedia page. Occasionally smart ones will Google and append "reddit" to the end of their search when looking for opinions but a lot of highschoolers barely know what reddit is. YouTube would probably be next up and then maybe TikTok. But Google is still 100% the first place to go.
Source: I'm a highschool student and spend a lot of my time with other highschool students.