I tend to take things very literally so I will say: it's got a lot more hoops than that comparison. Anybody can become a writer if they have the bare minimum tools, imo. They can't all be good writers but that hardly matters given the low risks.

To play the devils advocate, almost everywhere these days regulates chiropractors requiring licensure with an organization who themselves require degrees and comprehensive knowledge testing.

For example, Doctors of Chiropractic (admittedly a 3 to 5 year program just like most entry level Engineers) are licensed in all 50 states plus the District of Columbia and many U.S. territories. They are also regulated in many other countries throughout the world. Just a random specific organization, the California Board of Chiropractic Examiners require:

1. The Aforementioned Degree

2. NBCE. Chiropractic students must pass parts I, II, III, IV, and physiotherapy of the National Board of Chiropractic Examiners (NBCE) exam to be eligible to apply for a state license.

3. A full criminal background check with fingerprinting

4. CCLE. The California Chiropractic Law Examination (CCLE) is administered through computerized testing on a continuous basis. Once the board determines the applicant is qualified to take the CCLE, the applicant will be notified by letter.

As well as a bunch of associated fees and insurance requirements.

So, no, it's not as easy as publishing comments on Lemmy.

Do I think there should be non-medical doctors twisting people's necks and giving X-Rays? No, I goddamn don't, but we can say that without bullshitting.