There's nothing worse than listening to someone speaking English and you can't understand what they're talking about. The same effect happens when your readers go through your content and are no wiser at the end. In fact, your reader does not leave your content with a neutral feeling. The reader goes to your content with the hope of finding an answer to something and when they find they can't understand it, they leave with a sense of frustration.

1 No one talks like that. People do use the occasional long word or one that's not generally used as to its meaning. What they do not do is speak in very formal English, in literary English or in academic English. If you write like that you'll confuse them and they might never return to you. It isn't simply the lack of match between their language and yours. It's that they just won't understand it. Your meaning will have been lost. That defeats the whole object of your writing because you're aiming to communicate your meaning to them as fast and as easily as possible.

2 Write to him or her. Although it could be that many people will read your content, they're not all reading it at once or all together in chorus. They'll likely be sitting by themselves in front of their computers. It might be early morning or late at night. In other words, you are literally communicating with one person at a time. The cliche about imagining you're talking to someone sitting across the table from you, fits the truth almost exactly. It's just that you're on the computer screen, in your writing, and they're in front of it. So, literally write to one person. It might be someone you know or a stranger. You still have to communicate your personal message and meaning to them.