zpool.list parsable argument does nothing

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Description
Output from the zpool.list command is identical no matter what the parsable argument is set to.

Setup
Running salt-call locally on a SPARC/Solaris minion machine.

on-prem machine
VM (Virtualbox, KVM, etc. please specify)
VM running on a cloud service, please be explicit and add details
container (Kubernetes, Docker, containerd, etc. please specify)
or a combination, please be explicit
jails if it is FreeBSD

Steps to Reproduce the behavior

# salt-call zpool.list parsable=True
local:
    ----------
    orapool:
        ----------
        size:
            199G
        alloc:
            50.4G
        free:
            149G
        cap:
            25%
        health:
            ONLINE
    rpool:
        ----------
        size:
            49.8G
        alloc:
            23.1G
        free:
            26.6G
        cap:
            46%
        health:
            ONLINE
    swappool:
        ----------
        size:
            49.8G
        alloc:
            32G
        free:
            17.7G
        cap:
            64%
        health:
            ONLINE

# salt-call zpool.list parsable=False
local:
    ----------
    orapool:
        ----------
        size:
            199G
        alloc:
            50.4G
        free:
            149G
        cap:
            25%
        health:
            ONLINE
    rpool:
        ----------
        size:
            49.8G
        alloc:
            23.1G
        free:
            26.6G
        cap:
            46%
        health:
            ONLINE
    swappool:
        ----------
        size:
            49.8G
        alloc:
            32G
        free:
            17.7G
        cap:
            64%
        health:
            ONLINE

Expected behavior
What the documentation says:

display numbers in parsable (exact) values

Versions Report

salt --versions-report

(Provided by running salt --versions-report. Please also mention any differences in master/minion versions.)

Salt Version:
          Salt: 3004

Dependency Versions:
          cffi: 1.14.0
      cherrypy: 15.0.0
      dateutil: 2.8.2
     docker-py: Not Installed
         gitdb: Not Installed
     gitpython: Not Installed
        Jinja2: 3.0.2
       libgit2: Not Installed
      M2Crypto: Not Installed
          Mako: 1.1.2
       msgpack: 1.0.2
  msgpack-pure: Not Installed
  mysql-python: Not Installed
     pycparser: 2.20
      pycrypto: Not Installed
  pycryptodome: 3.11.0
        pygit2: Not Installed
        Python: 3.7.10 (default, Sep 29 2021, 05:44:44)
  python-gnupg: Not Installed
        PyYAML: 6.0
         PyZMQ: 21.0.2
         smmap: Not Installed
       timelib: Not Installed
       Tornado: 4.5.3
           ZMQ: 4.3.4

System Versions:
          dist: solaris 11.4
        locale: utf-8
       machine: sun4v
       release: 5.11
        system: SunOS
       version: Oracle Solaris 11.4

Start at the salt.modules.zpool.list_ entry point documented for the zpool.list command and reproduce the behavior with salt-call on Solaris using parsable=True and parsable=False. Trace how the parsable argument is handled and verify that the two modes produce the documented exact-value difference.

Written by the indexing model from the issue text.

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