The weak generic Arthur packet conjecture for GSpin groups

Let $F$ be a non-Archimedean local field, let $\textbf{H}$ be a quasi-split reductive group over $F$, and let $\boldsymbol{\psi}$ be an Arthur parameter with associated Langlands parameter $\phi_{\psi}$. Write $\Pi(\phi_{\psi})$ for the $L$-packet attached to $\phi_{\psi}$. A representation in an $L$-packet is generic if it has a Whittaker model, and a Langlands parameter is tempered if its image in the dual group is bounded.

Weak generic Arthur packet conjecture. If $\Pi(\phi_{\psi})$ has a generic member, then the Langlands parameter $\phi_{\psi}$ is tempered.

The conjecture is the converse direction to the tempered $L$-packet conjecture in the setting of Arthur parameters. The paper states that its main theorem proves this weak version for $GSpin$ groups, so the claim is solved in that case.