I think she's absolutely right.
The more breeders you talk to, the more you will get a feel for the breed. You will get conflicting information/advice, for sure, which will you will have to weigh up for yourself, but you will come away far, far better informed than you would from a conversation with just one or two breeders.
Most importantly, you will get to see dogs in the flesh. You will see the lines of breeding you like best, you will get a feel for the temperament of the different lines, you will get warts and all information from the people who know the breed best and you will be able to network. When you've decided which line you like best, you can put your name down for a puppy.
Get tickets for Crufts on the day that your favoured breed is showing. When you get there, go round the Discover Dogs stands and find the stand for your breed. They are run by the breed clubs and you will find very knowledgable people to talk to. Ask about grooming, feeding, temperament, exercise, health problems etc.
Later in the day, take a wander to the ring where your breed is being shown. The breeders, handlers and dogs will be based on the benches in the general vicinity of that ring (actually, if it's a Basset hound you fancy, just follow the howling, you'll hear them the minute you get through the door). This is your chance to chat directly to breeders. Make sure they've finished showing for the day, tell them you're interested in getting one, and just chat. Breeders love to talk about their breed (as long as they're not getting ready to go in the ring).
Each breed club has its own show, too. That might be an option if you find the idea of Crifts too daunting. You should be able to find details online, if not the Kennel Club should be able to give you details.
I went to Crufts twice and the relevant breed club show before I decided which breeders I would really like a puppy from. It's really worth putting in the effort to get the right dog.
And don't get a dog from a breeder that doesn't ask loads of questions about why you want that breed and your own circumstances. Any responsible breeder will, and you don't want a dog from a breeder that's irresponsible.