It's an attempt to get a handle on things and trying to avoid situations such as:
"Oh, I was struck on that point for the last 3 months. I reinvented the wheel 2 times and now it works."
"And now we're 3 months behind schedule. Why didn't you ask anybody?"
"Yeah, I didn't want to bother anyone. But I did put in on the timesheets."
"It says 'working on project'."
And that's how regular project update meetings get scheduled, and a bunch of messages asking for updates.