Until a few years ago I bought every Disney movie on Bluray on release day, which used similar release schedules as streaming, but I still saw the value in seeing many of those films in the theaters.
I think streaming is A factor but not the biggest factor to Disneys box office troubles, if they moved the streaming release back a year I don’t think it would have a huge affect on the box office, and it may be offset by D+ loses.
This highlights the bigger problem that the stories aren’t hooking people.
Despite all the recent releases being on D+ “for free” I’ve only watched most of them once, and a few I didn’t even bother finishing.
As I mentioned above I bought probably 99% of Disney movie on VHS/DVD/Blu-ray for probably 3 decades straight, I’m not sure I’d have bought the last dozen or so movies, they just aren’t something I think have repeat viewing potential.
Disney has lots of small problems but the biggest problem is stories that aren’t connecting with the audience.