Is paying dividends advantageous or not?
The answer to this question is actually nuanced: it is not necessarily advantageous or disadvantageous. The dividend a fund pays comes out of the fund's equity. Suppose a fund is worth 50 euros and pays 2 euros in dividends to you, the fund will be worth 48 euros after the dividend payment. However, you now have that 2 euros in your wallet, so you still have a total of 50 euros. So the value of your account does not change.
Impact of dividend tax
The value can change due to the dividend payment only if dividend tax is withheld. The dividends paid by the funds are directly reinvested in the respective funds at no cost. This keeps the dividend invested and you don't miss out on any returns. As a result, you do not have to reinvest the dividend received yourself.
Effect on fund value
Paying dividends reduces the fund's price slightly in value, provided there are no other effects on the price that day. In exchange, you receive additional units from the fund. Effectively, paying dividends does not affect the total value of your investments or your assets.