There's surveillance (parental supervision) and then there's "surveillance" (corporate psycos / overbearing governments).

You want your kids to learn independence in a gradual and some what safe / controlled way (not too safe of course). There are still some things I don't want them exposed to at age 10. Unfortunately unsupervised internet isn't the best option here. Outsourcing it to tech is a really bad choice for sure. You need to be present as a parent to help them navigate and answer questions. If you aren't, then some youtuber (or worse) will do it for you. There's also an argument that being present as a parent has become harder than ever on average for economic reasons (double income, wage stagnation, inflation, etc.), and also the problem that many parents have no clue how to navigate the internet responsibly themselves.