To be honest, based on what I've seen from my kids (4+7) I would not be so sure. They both watch Netflix, of course, but very few things tend to keep their attention and even fewer things they are interested in watching more than once. Netflix's quality content issue is not lost on them too, apparently!
Kidding aside, I have observed their behavior on this for a couple of years now. I've built for them a Plex server where I have put all the DVD and Blu-ray movies we've bought for them. They keep coming back to their favorite movies from that collection again and again - many of those, yup, you guessed it, are big Disney hits - while they watch Netflix stuff only when something new there catches their eye or when they are kind of bored. Plus, the Netflix stuff they return to is almost never Netflix productions (with some exceptions).
I do get why you think that data is important. And it is. But up until now *this has not worked* with great results for kid content or mainstream content or anything else. Please take a look at the movies Netflix produced in 2021 that it was painfully obvious it did based on data, even expensive ones such as Red Notice. None of them are any good. It's just more garbage for people to consume when they have nothing else that they'd *actually* like to watch.
Netflix still hasn't figured out how to make really good movies that deserve mainstream success. Most of them nobody would pay to watch e.g. in a movie theatre if they were not part of a subscription he/she is already paying. TV shows is a different discussion - Netflix has offered some extremely good ones over the years - but I cannot recall many Netflix TV shows that kids fell in love with.
Disney's catalogue, established franchises and star power do give Disney Plus an edge Netflix does not have. Especially as far as kids content is concerned. Whether the company will make good use of that edge in the future is anybody's guess but, for now, there's just no comparison.
If Netflix goes down the same path with kids content that has followed with mainstream content so far, it will just be offering a large bucket full of mediocrity. Of forgettable movies and TV show franchises that go nowhere (if it lets them get past their second season) . It's not easy to build likable characters and stories and help them evolve over time while remaining popular (Disney has had its fair share of duds too while trying to do that after all). Netflix cannot just do this in a few short years, data or no data.
Long story short: I am not optimistic about Netflix at all. More and more each year it seems to me that it's a bubble that will burst at some point if it does not make serious changes in the way it views and produces content. When there was no competition, sure, it worked as an alternative to other stuff people liked doing. But quality matters. A number of other streaming services will make more people see that and, when that happens, Netflix will begin losing subscribers. The company should be looking at how it can avoid that - and fast.
