You are confused about wiki, it's encyclopaedic articles and an overview, a good jumping off point (that's what the references at the bottom of the page are for, does this help https://en.wikipedia.org/wiki/Master_boot_record#References), not the sum of all human knowledge

"If i have to edit it to make it accurate, why should i rely on wikipedia in the first place?"

And there we have it, the entitlement with no expectation of giving anything back. It's for other people too. You're not the only person who uses wiki, you just haven't realised it yet.