2, the fund dividend is indeed returned to you, because the share has not changed, the net value has decreased because of the dividend, and you have more cash in your hand, and the total value has not changed. This statement is correct. If you choose to reinvest in dividends, your share will increase.
3. It doesn't matter whether the fund pays dividends or not. It is just a way of capital operation and a form of maintaining the structure of cash and securities. I think it can at least reduce the risk, especially in the current market volatility, which is a good way to avoid risks. It can be considered a bad practice that dividends in a bull market do not enjoy the rapid rise in net worth brought about by the rise.