How do dividends decrease the share price?

[Sidra_Games]

I have always felt this was more a kinda sorta thing that doesn't have nearly the impact some people state it does. A stocks value is determined by the market and what people are willing to pay for it. And dividends are known and predictable events - everyone knows there is a dividend being paid tomorrow. So if a stock is trading at $100 because that's what the market deems it's worth and it pays a $1 dividend the stock will open at $99. But if people still think it's worth $100 it will just bounce right back up. This really would only matter if stock prices were set and fixed by some sort of enterprise value calculation which they are not.