Makes a huge difference when considering the tax implications.
You just won’t see the tax withholdings on your statement because it shows up on theirs.
Also I keep money in index funds even if I don't plan on using that money for retirement. (e.g. downpayment on a house, saving for another large purchase, financial buffer, etc.) I also keep money in index funds that are in regular brokerage accounts because 401k + backdoor roth ira isn't sufficient for retirement if you make $200k+/yr. (True for even lower amounts too but whatever)
I wish.
But no, dividends are taxed:
https://www.belastingdienst.nl/wps/wcm/connect/bldcontentnl/...
What you probably miss is that dividend tax for non substantial holdings (less than 5% of the total stock) is withheld before being paid out.