I think it is only the case in companies where there is no proper onboarding process or it is an afterthought.

I was hired as a remote worker in a company in late 2021 and it was the most seamless onboarding process I ever had. I remember in a lot of companies having to chase people, trying to find them or waiting for them to get back from a meeting. Or the unpleasant experience of spending hours with a new hire and literally feeling his breath behind your neck while I would show him something and not being able to multitask at the same time on other things, especially those that had a private matter or were too confidential for that person at this stage. I am currently doing a lot of knowledge transfer for a new member of the team while I am moving to another one and I spend hours in video call with that guy. I am sharing one screen, while I can still do other tasks, reply to emails/instant messages in a separate screen. It is more walkie-talkie approach than a real videocall. But I can work on something and I don't have to tell him "look I have to do something urgent and confidential, let's discusss in a bit again" and then get dragged by millions things and not being able to get back to him.