The problem is people don't really understand what is going on, and the person talking to them does not check that they do. We don't like to look stupid, so just accept what we are told.
I had a client who was at the time in receipt of benefit (Income support it was called then), the bulk of which was to pay his mortgage. (Do they still do this?), He had a little self-employed income, working a day, here and there which he did declare when he signed on every 2 weeks. This was after the last recession - quite a long time ago.
An Insurance sales person, spent many hours doing a "fact find" and decided to record the money he received to pay his mortgage as his income on the paperwork. (About £20k pa) She scared him into thinking he must provide for his family (He had a son, who he had joint custody) and take out PPI to cover his mortgage payments! I did his tax returns for him, and when I reminded him that it needed to be done, he complained about being completely broke, and would not be able to pay me the nominal fee I asked in those days, to clients on hard times. I asked him to send me his bank statements and records and we'd sort it out when things improved. When I saw the monthly payment on his statements I asked him what it was for. He said he did not know, but the Adviser told him he had to have it, it was essential, and he would not be a good father if he did not have it.
Long and short of it - he eventually go his money back..... But he really thought he had to have it! Even though I pointed out it did not give him any protection - as he put it - the "Advisor" knew everything, he didn't hide anything about where he got his money etc. I must admit I want to know what is the point of going to someone for advice, when they give you something that you cannot use, or suggest you take out something which you can never claim on. The are the advisor - not the client.