The page you linked explains the rationale:
> Veterans who successfully obtain their 5-year temporary teaching certificate will be assigned a mentor teacher for a minimum of two years to support their classroom teaching endeavors. They must also earn their bachelor’s degree during the 5-year period to be eligible for a full professional certificate; the temporary certificate cannot be renewed once it expires.
It’s a temporary pathway for veterans to work as teachers while finishing a bachelor’s degree. (This has been widely misreported in the media.)