YANBU.
The dentist/consultant/GP clients I've had over the years have been generally utterly hopeless with money and admin generally. I'm talking about unopened envelopes territory where they just sent a carrier bag of unopened envelopes for me to sort out their taxes etc - not even opening their bank/credit card statements.
One guy who'd been previously a 100% NHS consultant started to do private work and asked me naively if he just had to post all his invoices, bank statements etc to HMRC for them to sort through it all and send him a tax bill. He was aghast that he had to actually do his own book-keeping, make a record of his expenses, mileages etc. He said his "secretary" previously did all that was needed for reclaiming expenses from the NHS etc!
Another guy, a self employed dentist "outsourced" it all to a book-keeper, including checking off NHS payment schedules, paying the practice bills (utilities etc) - he just gave her a book of signed cheques and told her to pay people as and when necessary - complete abdication!
Similarly with other professionals, sadly, such as architects, solicitors, financial advisers, quantity surveyors, etc. Clearly not interest in doing their own "books" presumably because they earn enough it doesn't matter to them if they end up paying a bit too much tax or over-paying utilities etc - certainly they seem to think it's not worth their time to spend on "trivial" things like money!
A really good case was a very high paid IT consultant - talking £1k per day. She was paid on a 4 weekly billing cycle rather than calendar months, and when I came to do her year end accounts/tax return, I immediately noticed only 12 payments from her client, so there was one missing as there should have been 13 in the year. Turned out despite her filling in her time sheet every week, the client had "forgotten" to process one 4 week period, and amazingly she hadn't noticed as she'd got a banking from them every calendar month and didn't realise one month there should have been 2. That was around £15k-£20k she nearly lost and he didn't even realise! Thankfully, the client was still in business and she raised it as an issue and they paid, but if they'd have gone under in the meantime (like lots of consultancies do), she'd have lost that forever.