Why might a client set QuickBooks Online to not suggest categorizations from a vendor?

When a client chooses to set QuickBooks Online not to suggest categorizations from a vendor, a significant reason for this decision can be that the purchases from that vendor vary widely and pertain to different accounts. This variability means that it's difficult for the system to apply a consistent categorization rule, as the transactions do not conform to a predictable pattern. If the client is acquiring diverse products or services from the vendor, each with different accounting impacts, managing these entries manually ensures accuracy in their bookkeeping.

In situations where the same items are bought regularly or where a company has a robust categorization system already, the need for customization in how transactions are categorized might not be as pronounced. Regular purchases or a maintenance of a fixed system would lend themselves to automated categorizations that align well, unlike in the case of varied vendor transactions.