Yes, there are many different risks, but let's see now...
Things like cleanliness and age appropriate toys, you're assuming registered centers get daily inspections. I don't know about other countries, or even our other provinces for that matter, but here in Ontario, registered centers get inspected yearly. What about the other 364 days?
Proper training...
I've been around long enough to know that no course can teach as much as real life experience. Training will teach things that may not have been learned in real life yet, so it does have it's pluses, but even with the best training, it doesn't guarantee that person will be good with children. It comes down to the question, did they take the course because they love working with children, or was it because they want a job? There were never courses on parenting or child care 30 years ago. Does that mean nobody has done it right for the previous 2000 years?
Training is an advantage, but it doesn't guarantee anything.
Other risks like any form of abuse exist for all children, whether in any kind of care or never in care. Even in group care, are the adults strapped together in pairs to make sure no child is ever alone with one adult? At home, do you never leave your child alone with anyone? An older sibling, aunt or uncle, cousin, lifelong friend, what about the father, or even the mother? Children have been abused by everybody. Even not left alone, there are cases where both parents abused their child.
I guess this is a good time to bring up another reason I'm going into this new business.
When I was 14, I saw a movie called "Little Ladies of the Night". I'd never even heard of prostitution before then. After that, I started studying and found out about things like abuse and why children live on the street, and just how bad it is out there. I made my life decision when I was 15, and have done a bit since then, but will never be able to do what I really wanted. I decided I'm doing whatever I can to protect children and help get and keep children off the street. I few years later I saw "Children of the Night", not the newer horror movie, the one with Kathleen Quinlan as Lois Lee. I then found out about the real Lois Lee and the "Children of the Night" organization and I decided that one day I was going to do the same thing.
It looks like my lifelong plans will never be, so instead I have to do what minor things I can do to help protect children, so I have a couple websites about child abuse and protecting children.
Every child that has been in my life has been taught a little about what they need to know. In every case, I talked to the parents first to enlighten them, then asked if they wanted to talk to the children or wanted me to and in all but one case, they asked me to.
With my new business, any children in my care will also be taught about touching, secrets, and their right to say no, age appropriately, by either myself or the parents.
Now for a whole new set of replies...
lol