Nail on the head. Some people just can't be arsed to read letters/leaflets. Fair enough, but they need to own the consequences.
It was like all those compo claims for endowment mortgages - huge numbers of people trying to claim they were never warned of the risks. Bollocks! Where I worked back in the 80s, we did loads of endowment mortgages (in the days before regulation and independent financial advisers). We were "just" a firm of accountants who arranged pensions and mortgages etc for our clients (no one else, just our clients, as a service!). Because we were in a profession where detail mattered and we were used to "dotting the I's and crossing the t's" we were really on the ball when it came to advice, warnings, etc. I understand solicitors' firms were the same with any "financial services" they offered!
When the shit hit the fan, we had loads of compo claims by the "no win no fee" vultures, from clients who claimed they were mis-sold, never warned, etc., Every single case, we managed to bat away. We had our paper files (long archived into our manky cellar!), but we'd go down, find the file, and there'd be the document, signed by the client(s), with a warning of the risks, etc., right on the same page as their signature! Not a single claim was successful as we had the proof that we had warned them and done a proper risk assessment for them - they'd either never bothered reading what they were signing or had forgotten, or were simply on the make for the quick buck!
I have a couple of financial adviser clients who were badly stung by compensation claims. Both were adamant that they'd given the warnings at the time, but sadly, they hadn't kept their records (they'd had then shredded after x years as advised at the time), so couldn't prove they'd given the warnings, conducted the risk assessment and got their client's signatures on the warnings. Their insurance paid out of course, and they got stung for huge insurance renewal premiums for years afterwards. Not their fault, but they couldn't prove it! They, likewise, now keep files basically forever!