Board decisions are made by people, and people get named
Disputes with an association over enforcement, assessments or maintenance can name directors individually as well as the association. The association normally carries directors and officers cover, and whether it is adequate, current and actually covers you is not something most volunteers have ever checked.
Some umbrellas extend to volunteer roles
Many personal umbrellas include liability arising from service as a director or officer of a nonprofit, provided the role is uncompensated. That extension is valuable, it is not universal, and it is specific enough that it has to be asked about by name.
Uncompensated is usually the condition
The extension typically applies to unpaid positions. Taking a stipend can move the role outside it. It is a small detail that quietly changes whether the cover applies.