Not everyone thrives in remote work situations. Some people are highly self-motivated in relative isolation, others are not.
We strive to make work not isolating and to foster communication both online and in-person. However, there is no remote communication that can create the same social connection as seeing people every day. So, while we try to create the best environment we can, we also accept that certain people will be happier and more motivated than others in a distributed environment.
Many people who think they'll like remote work find they don't. That's one reason distributed companies like it when candidates have worked remotely before. If you've never worked at a remote company and are considering applying for a remote position, it's worth talking to people you know who've worked in distributed teams for multiple years to get their perspectives.