[smsm42]

Lawyers and accountants can - and do - keep flexible hours when not dealing with clients. When dealing with clients, there's still expectations that the lawyer would be able to meet you somewhere within 9-5, and not at 2am. Of course, there are exceptions, but that's a convention. People want to have lives outside job, so there should be an agreement when we have "meeting points" that we're expected to be on the job, and when there's no promise.

> just a placeholder for "Oh, well those are the official times that denote when I will be available to do work stuff"

It's not "just", it's very important coordination point. If lawyers kept random hours and you needed a lawyer, it's be much harder for you to find one because you'd also look for one that has suitable hours. Not impossible, but harder. To lower transactional costs, the hours are roughly synchronized.