I thought the same mate,
tbh it’s what you feel comfortable with, but what most people don’t think about, no matter where you put your money you are paying for the privilege, sometimes a hidden cost, say you are getting 6% on a product what do you think the company who own that product are getting from it been invested probably 12% or more none of these investments are free companies are making money off your money.
So am 3 years into retirement now, and don’t have all my investments with them, probably half but for example their products have done better than the Vanguard ones which I have plus you also pay too use there platform, at the moment I would rather have a mix rather that lumping everything in one basket.
Say for example with no advice u manage yourself and your pot of say 500k is making 6% but the IFA recommended products have made 12% the 0.65% fee is quickly forgotten.
More importantly for me was
The tax I claimed back as without there knowledge I would have lost that money.
I won’t mention how much but it was a decent amount as I was paying 40% income tax at the time.
On of the reasons I got tax back was
In my last 3 years working I hadn’t used up all my tax free allowance paying into a pension pot, so they advised sticking my redundancy in a new Sipp
and that meant I wouldn’t be taxed 40% on everything above the 35k tax free redundancy allowance. Quids in

Your bank will offer a wealth management service and the first appointment is free imho its a no brainier for anyone who isn’t in the financial sector.