  Because the Klein-Gordon and Proca equations involve $\hbar$, they describe
quantum fields. Their solutions, however, may be treated as classical if their
typical action obeys $S^{\rm typical}\gg \hbar$. This is possible due to their
bosonic nature, allowing states with many particles. We show, by generic
arguments, that the typical action for such bosonic stars is ${\mathcal{S}^{\rm
typical}}/{\hbar}\gtrsim \left({M^{\rm max}}/{M_{\rm Pl}}\right)^2\sim
10^{76}\left({M^{\rm max}}/{M_\odot}\right)^2$, where $M^{\rm max}$ is the
maximal bosonic star mass of the particular model and $M_{\rm Pl}$ is the
Planck mass. Thus, for models allowing $M^{\rm max}\gg M_{\rm Pl}$ and for
solutions with mass $\sim M^{\rm max}$, the classical treatment is legitimate,
which includes masses in the astrophysical interesting range $\gtrsim M_\odot$.
