In order to use the meetings tool, you have to use the Google Calendar Integration. Unfortunately, this syncs ALL meetings, including internal meetings that have no reason to be in the CRM and this generates inaccurate reporting.
A couple of ideas to solve:
Add some HubSpot plugin to the calendar booking similar to the log/track settings in Gmail.
Add additional rules in setup to define what meetings are logged
A blocklist similar to what's available for logging emails ("Never Log" list under Sales Settings)
Add some admin tools to turn off certain users from logging/tracking