That's your opinion, I think people who are more informed than you think they are. NTMA products are probably at least as safe as savings in any Irish bank.
As per your own Key Post, interest rates from some of the NTMA products are very competitive. If there are DIRT or other tax changes in the next budget, they could become even more attractive.
In my experience, the customer service from An Post is far superior to the customer service from the banks. The procedure for withdrawing early from fixed term NTMA products is clear and An Post staff are efficient and professional.
Whereas if you try to withdraw your money early from a bank fixed term deposit account no doubt the bank staff will lie, fudge, waffle, stall, delay to try to keep your money.
Even opening a deposit account in a bank can be a painful process as they ask all manner of irrelevant personal questions or try to persuade you to invest in a tracker bond instead of the account that you want. There is none of this with An Post.
Also, what's the alternative to NTMA products for risk averse savers. The sort of people who put money in deposit accounts are not the sort to gamble on gold or equities..