Should VAR[n]=val cmd export VAR?

The option ALL_EXPORT (-a)
<https://zsh.sourceforge.io/Doc/Release/Options.html#index-ALL_005fEXPORT>
is described as automatically exporting all parameters subsequently
defined. This extends to parameters subsequently assigned, including ones
with a subscript:

% zsh -c 'typeset VAR=123; set -a; VAR[2]=X; set +a; typeset -p VAR;
printenv VAR'
export VAR=1X3
1X3

Inline assignments export the assigned parameters (with or without
ALL_EXPORT option) but in that case parameters with a subscript are excluded
<https://github.com/zsh-users/zsh/blob/489436767786ec8c8e16436d00ff3c7c4ce0a380/Src/exec.c#L2641>
:

% zsh -c 'typeset VAR=123; VAR[2]=X typeset -p VAR; VAR[2]=X printenv VAR'
typeset VAR=1X3

This discrepancy looks strange to me. I expected that "VAR[n]=val cmd"
would export VAR. I find the lack of export even stranger given that
"VAR[n]=val"
exports VAR when ALL_EXPORT is enabled.

Wdyt? Could we change inline assignments to also export parameters with a
subscript?

Philippe