You're kind of arguing against the foundation of human society. If we're all required to "do our own research" about things, where does that requirement end?

Yes, you should do your own research. How much research you need to do depends on the subject matter, how critical it is, and the potential for motivation to mislead you. I can't tell you where that ends, but for politics and news I am of the opinion that it should end a lot later than trusting a random stranger to censor your access to content.

How can I buy food if I have to do my own research on what's healthy or what's dangerous?

You probably should research this.

What about my tap water?

Yeah, you probably should also research this before drinking it because of how critical it is. Maybe get it tested or read your city's water test results. Do they have motivation to mislead you?

How can I put gas in my car? Use electricity? A computer? A phone?

I'm not sure what the struggle is here.

Somewhere along the way you have to trust the systems that have been built by the people before us to function, and for people who work in those fields who are experts to use their expertise.

Yes and no. Should you see inconsistencies, you should probably verify that what you're trusting is accurate. Inconsistencies like blocking wikileaks on a qanon blocklist. However, what you're talking about isn't even the case here. We're talking about a blocklist maintained by strangers on the internet.