Don't use LastPass. It's a nightmare. Terrible sync and thinks like "Do not make password visible to shared contacts" are a huge PITA with no real benefit
While it is an inconvenience, like most security, I suspect the benefit is that folks can't just write down or copy a shared password somewhere else. It keeps it relatively contained, for times when employees leave the company. I'm unsure whether or not a determined user could get the password anyway.
The sync is slow-ish; I moved an entry to a shared folder and it took 20 minutes to become available to others.