You will never be able to block them from viewing stuff they want to see. They’ll either do it through their friends devices, on other WiFi connections, or at school where networks are hilariously open or easy to bypass.
The best thing, and frankly the only thing you can do as a parent is to be engaged with them. Make them think critically on subjects, and if something they parrot back is nonsense, call them out on it. Cast that seed of doubt in their mind. If they choose to continue to watch stupid shit, that’s their choice, and it’s only worth stepping in if it’s actively dangerous.
The Gordon Ramsay anecdote is actually really good, in that in my experience VC’s get a LOT of say in what your business ultimately becomes.
I worked with someone that was, in all fairness, absolutely clueless about what they wanted, and wanted some VC alongside their rich parents money. The VC took a huge chunk of the business, and ultimately their business launched as something that was completely different to what they thought it would be - because that’s what the VC believed would give them some return. The business went bust in less than a year and launched for maybe 2 months?
Much like how Ramsay says “your Jamaican restaurant is shit, I’ve remade it into an Italian restaurant because there aren’t any nearby”, taking a lot of VC money almost certainly means they’ll want an equivalent say in your business. It’s not free money, and it absolutely fucks a lot of people up when they take that money and realise that their dream isn’t theirs any more.