To expand on what I said upthread...
(TLDR: I am a judgmental cow, but I have my reasons.)
When you see someone with a pedigree Westie or Bichon walking down the street, there are reasonable odds that the dog was sensibly bred by someone who was doing it primarily for reasons other than turning a profit. When you see a doodle, the odds of that diminish. There will be doodles out there who are sensibly and carefully bred, but a much lower proportion of them will be than, say, Cairns.
I can understand though why people sometimes want to avoid pedigrees (and I say this as someone who has had both pedigrees and crosses, and grew up with a mutt and a pedigree).
Some breeds have been developed to ludicrous extremes - their faces too flat for them to breathe properly, their backs too long for the to jump off the sofa safely, their skulls to constrained a shape for their brains to fit properly. Or they have too much coat, or over-long dangling ears that need cleaning regularly and still get infected.
Behind all of that you have the genetic issues that plague certain breeds. You can health-test your way past PRA or von Willebrand's, and you check the hips and elbows of the parent dogs, but some things remain concentrated in specific breeds but impossible to test for (Vizsla Inflammatory Polymyopathy, for example - a genetic test might be on its way there but so far nothing seems to be certain). Cavaliers are so prone to Mitral Valve Disease that the only way out is probably an outcross; Dobermans similarly have heart issues that are widespread in the breed; some breeds are very prone to cancer. If a breed has a high risk of an issue, but other breeds do not, then that problem is genetically mediated, and if you outcross to a breed that doesn't have the problem, you up your chances of a healthy puppy.
The final issue is all the problems that come with a high degree of inbreeding: increased risks of cancer and immune issues, lower life expectancy, smaller litter sizes... You can find the coefficient of inbreeding (COI) for a litter on the KL website (or you used to be able to, anyway) - but that is just the known level based on the known pedigree, not on the genetics of the dog. Even with that, when we were looking for a puppy a few years ago I was finding litters that were 20-25% inbred - 25% is the same as a full-sibling mating. I think that is grossly irresponsible. Your chance of doubling up on dodgy recessive genes (which we all carry) is massively increased compared to a dog with a much lower COI.
So people look at all that and think buying a crossbreed will solve all these problems. And sometimes it does - I have known a lot of healthy, long-lived lurchers, scrappy farm terriers ('Jack Russell - well, grandad was a Patterdale, one of the grandmas had a bit of collie in her...').
But if the dogs that are bred are genetically neurotic, and the puppies are then reared in much less than ideal conditions, you might get a healthy dog who is an absolute nerve-bag. Or if the parent breeds are both prone to PRA, and the breeder hasn't bothered to test at least one of them for it, you still risk a dog who will go blind. Or the parent dogs just have shitty lives in some windowless barn, producing litter after litter.
So, yes, I do judge people who get their puppies from puppy farms. I judge people who have pugs and dachshunds from the more extreme ends of the breed type (which is most of them now - my GPs had a dachsie who was very moderate, but that was 40 years ago - you see very few like that now). I judge people who have dogs with insane COIs. And I judge the breeders of all those dogs even more severely than the owners, because a lot of puppy buyers have a vague idea that a crossbreed will solve the problems that they are worried about, and have no idea how unscrupulous some people are, and don't do their due diligence, whereas the breeders are the ones who oversee a 4 yr old bitch having her 6th litter, or are so driven by their desire to win at Crufts that even though they'd never breed siblings, and do all the health tests, they're happy to produce litters with eye-watering COIs.
Sorry, that was long! 10+ posts while I was typing.