The number one reason I had was, because everyone can just be them, it's a lot different than in the office.
The job can and should be a lot more inclusive and diverse when you're working in your own space -- home office, cafe, etc. You find what works for you, without having to worry about messing with someone else's flow in the next cubicle or being interrupted in your own flow by someone that always needs to escape their own work. Someone that wants to do something distracting can, without annoying others, everything is on your own terms, even if you have to take care of other family members.
With audio only you're just another human, not to be judged on appearance or malformation or what have you; which opens barriers that are presented in the office all the time, hell, it might even scare your interviewers from giving you the job in the first place! Either people can be cruel or incessantly think you're helpless.
I've noticed over the last year, those colleagues that are more introverted sometimes have a better go of presenting how they think online. When sharing their screens they're able to show more of their presentation skills, a lot more chances to present in a way they've developed overtime. And not more opportunities, it's probably the first opportunity they've had to shine than if it they were in an office; it doesn't happen.
In my opinion, I feel like those that are people-people will always get ahead in an office setting versus those that think a bit differently, look a bit differently, dress or act a bit differently, and this makes it a more level playing field for the latter.