Preparation stops being a scramble
When a meeting is linked to the account, opening it gives you the history: the open opportunity, the last conversation, the outstanding task, the document sent a fortnight ago.
Without that link, preparation means searching an inbox and hoping. The meeting still happens; it is just less informed than it could have been.
Shared visibility prevents collisions
In any team past a handful of people, two colleagues contacting the same account in the same week is a recurring embarrassment. A shared view of customer-linked events makes it avoidable.
It also helps managers see coverage — which accounts have had contact this month and which have quietly had none.
Follow-up belongs to the meeting
The commitments made in a meeting are its most perishable output. Written into a notebook they survive a day; written as tasks against the record they survive the quarter.
Creating the follow-up task at the moment the event is closed out, while the record is already open, is a far smaller act than reconstructing it later.
Event types worth distinguishing
Not all calendar entries are equivalent, and treating them identically loses information. Distinguishing a discovery call from a delivery review from an internal check-in lets you filter and report on customer-facing time specifically.
Configurable event types make this a labelling decision rather than a naming convention nobody follows.