ETFs are still are very small component of the Australian market when compared to say the US and U.K. market. I actually like sector ETFs as they help reduce the risk of trying to choose the "one" in a sector I want to be in but, feel I do not have the expertise to choose that single potential winning stock. Combine this with my feeling that this is where significant money is going to flow from the next generation of investors (including the time poor, non interested passive investors and/or the ever growing FIRE proponents) I am happy to ensure I allocate a % of my personal portfolio to specific themes such as cyber security, gaming, asia etc where I feel the growth potential will be significant.