Quick answer: One bug tracker view doesn't serve every role. Engineers want fix lists; designers want feature impact; producers want release status.
A tracker that's customizable per role is used by everyone. A one-view tracker is used by engineers.
Engineer view
Assigned to me, by severity, with repro steps. The fix list.
Designer view
Per-feature, with impact. Surfaces gameplay bugs in the designer's areas.
Producer view
Per-release, with status. Burndown chart; release decisions follow.
Triage view
New, unassigned, by recency. Triager owns this.
“Tracker views are workflow. Customize per role; usage grows.”
Most teams use a tracker's default view. Customizing per role is one-time setup; the value compounds.