How to treat the output of a command as an "ordinary text"?

Question

In the following example, how can I treat the output of \cite as it was a simple string of text?

\documentclass{article}
\usepackage[style=numeric-comp]{biblatex}
\begin{filecontents*}{\jobname.bib}
@book{A,
    title = {A Bla},
    author = {A Foo}
}
@book{B,
    title = {B Bla},
    author = {B Foo}
}
@book{C,
    title = {C Bla},
    author = {C Foo}
}
@book{D,
    title = {D Bla},
    author = {D Foo}
}
@book{E,
    title = {E Bla},
    author = {E Foo}
}
@book{F,
    title = {F Bla},
    author = {F Foo}
}
@book{G,
    title = {G Bla},
    author = {G Foo}
}
\end{filecontents*}
\addbibresource{\jobname.bib}
\usepackage{listofitems}
\usepackage{scontents}
\begin{document}
  \nocite{*}
I would like this example:
\setsepchar{,}
  \readlist\foo{\cite{A,B,C,E,F,G}}
  Show items: \showitems\foo\par
  Term 1: \foo[1]\par
would give the same output as this example:
\setsepchar{,}
  \readlist\bar{[1-3,5-7]}
  Show items: \showitems\bar\par
  Term 1: \bar[1]\par
  Term 2: \bar[2]\par
\printbibliography
\end{document}