People may care. But, if the company policy is that people can work remotely when they want to, asking others to commute into an office on a regular basis is a pretty high bar.

I've got 13 years of experience, and I really worry about new people starting remotely today.

I'm not saying I would have failed completely if I started out in a fully remote environment, but I am very confident that I would not have leaned nearly as fast or as much or as deeply. I bet I would be multiple years behind in my career at least.

I get that some companies or teams or individuals seem to think they have figured this out (seeing some responses here). I hope some among them are writing books (or detailed blog series) specifically on this topic.

Sounds like a good argument for apprenticeship-style training. The trades do it fairly well, and I reckon you could probably skill up a number of IT folks and jr coders with a similar approach.