Get "Unable to extract symbolic link" error message when trying to install civicrm 5.19.1 module in Drupal
UPDATE: This is now fixed in 5.31.

I see what you're saying. Thanks for reporting. I've never used that alternative before. I believe it's coming from this line where it excludes the docs folder so the symlink is no longer valid.
https://github.com/civicrm/civicrm-core/blob/5.19.1/distmaker/dists/common.sh#L166
I've made a ticket at https://lab.civicrm.org/dev/core/issues/1393