That the wealth management industry has done an excellent job of convincing the public that they are not capable of looking after their own money and need to pay someone to do it for them, when in reality a balanced ETF would give them the same results at a much lower cost.
Actually they do a better job of money management than the vast majority of people. Just guessing, but judging by the posts here; the denizens of this site don't seem to be in the small minority.