As a complete novice, my thinking was the more there is in the mix, the less likely to get the various 'issues' that can plague pure breeds? I've no idea, we are just learning. Hence we went to a registered breeder and got our fingers very badly burned - and our hearts broken.
I do get it, @RockOnTommeh. It's hard to get right. It's really hard. I think you are confusing 'registered' breeder with being a 'good' breeder. It is easier to find a good breeder if they are KC registered - because you can check things like health tests, how many litters the dog has had etc. more easily - but finding a great breeder, is hard. It can take months of searching.
You talk about 'issues' that effect pedigrees. I assume you mean health issues (i.e. that all pedigree dogs are unhealthy).
So, let's take the 'healthy' dog argument. People often say that 'pedigree dogs are riddled with health issues.' And it's true, some are. But, health issues are just as likely to happen in mongrels, or doodles, as pedigrees.
Just because you've bred two separate breeds doesn't mean you've eliminated health issues. Look at Cockerpoos. Lots of them suffer from PRA (leading to blindness). PRA effects both Cockers and Poodles. Most 'doodle breeders' will claim that it's less likely that the puppies will suffer from PRA, but that's not true. Not unless the parents have been health tested. The only way to avoid them is to have as many health tests - of as many generations - as possible and be as careful with the stud and the dam as it is possible to be. Which is where pedigree breeding so often comes into it's own - because all the information you need to check parents, grandparents, great-grandparents health tests is at your fingers. But with mongrels or pedigrees? That's suddenly becomes a lot harder - if that information is available at all. And many designer doodle breeders do not breed from the healthiest dogs - they breed from family pets. And those dogs might be nice, and reasonably healthy. But are they the healthiest dogs out there of their breed? Probably not.
I'll give some examples for health testing, as I think it might be helpful for you to see it written down. I breed Golden Retrievers. Typically, they can suffer from elbow and hip dysplasia and eye issues (PRA) and heart defects. People often deem them to be 'unhealthy' (although nowhere near on a level with Pugs or Frenchies).
Typical scores for the breed (there are lots more tests that should be done, and I have done, but these are the main ones):
Elbows: 0/0
Hips: 8/8 (overall average is 17 for the breed)
PRA1 & 2: Clear.
Heart: Clear
My girl:
Elbows: 0/0
Hips: 2/3
PRA1& 2: Clear
Heart: Clear
The stud:
Elbows: 0/0
Hips: 3/3
PRA 1&2: Clear
Heart: Clear
The sorts of scores my girl (and her mum and her grandmother) have, are very rare in the breed. They are the result of over 50 years of my mum, and then me, breeding the healthiest dogs we can. It's reflective of months of research to find the right stud, to ensure the pups are healthy. Being honest, it's the sort of commitment that you will not find in designer doodles - at least not without months, if not years, of research.
I can guarantee that you will not find a 'Goldendoodle' where the Golden parent has health tests anywhere near as good as my girl nor the stud I used. Why? Because most pedigree breeders with scores like these breed to make the breed better.
Is it possible you might find a Goldendoodle where the Golden parent has decent health tests? Yes. I'm sure it is.
But why settle for decent when you could have incredible?
Edit; Just to say, I genuinely have nothing against designer doodles. But I think too many people buy them because they are popular or 'hypoallergenic' (and lets not go down that route) and lots of those people inadvertently contribute to puppy farming. If you can get a health doodle and you know what you are getting into, then go for it. But I view designer doodles a bit like Collies - they need the right person to buy them. Collies need the right owner because they are difficult dogs to own. Designer Doodles need the right owner because there are a lot of bad breeders - hiding behind fancy words - and that results in defective dogs.