FISMA certified ( and accredited ) means a great deal more than security planning.
Certified means it was tested by an independent security tester to NIST 800-53, using 53A and all associated security pubs. I won't get into the specifics of the security testing required for this, but it is wide and primarily comprehensive*.
NIST's Risk Management Framework
Accredited means that a government executive read over everything, with the advice of government security engineers, and still thought it was a good decision to authorize government use. Government types are notoriously risk-adverse
NIST goes far beyond what you see in unregulated industries. If you don't understand the control set, you really are not qualified to speak. While there are other regulated industries that may have similar protections, they are few and far between.
* NIST control sets still need improvement in software security