Is a motorcycle endorsement really required in this state?

What for exactly?

It's the cops who think we can drive cars and ride bicycles but we're somehow unable to ride motorcycles without special instructions.

Bikers line up at girl’s lemonade stand after mom helps save them during crash
The Milwaukee Iron motorcycle group of Kokomo, Indiana, lined up at 8-year-old Bryanne’s stand after her mom Daryn Sturch, a nurse, helped them after a highway crash.

It looks like there are codes on these driver license endorsements to indicate and enforce motorcycle gang affiliation.

It's the vehicle, the leather jackets with gang insignia, the helmet, the tattoos, the special driver license endorsement, the exaggerated bravado, the girls, and the code of omertà all sold as a package deal at certain “shops” catering largely to a 55+ crowd of disaffected males and deadbeat dads. Utterly boring, disgustingly banal, and no way to make money or earn a living outside of an organized crime group

Are the gang affiliation and driver license endorsement really legal requirements to purchasing or possessing a motorcycle? And how much bloody liability insurance do you need? You're dead if you crash and cause so much damage that they're suing your estate.

It's not really a crowd that offers safety in numbers, either. There are certain things that are too appropriate for certain demographics, and there's no good future or longevity associated with those lifestyles. (Similarly disaffected females of that age will somewhat more typically buy a van and live a female-dominated “van life.”)

The common denominator among motorcycle clubs is poverty and inability to afford a nicer, four-wheeled, hard-top vehicle and the fuel for it. In spite of a criminal record, almost any one of those guys with a halfway decent reliable car and casual clothes with shoes could show up for a vanilla job interview, get hired, rent a place to live, and from then on lead a “boring” life certainly with the option but with very little reason to take that motorcycle out from its spot in the corner of the garage ever again.