Maybe it's a marketing issues.

Actors and other have "Guilds", lawyers have a "Bar"...

(sure the other two you mentioned have unions but...)

100% Agreed, and if we can combine that with some apprenticeships and minimum quifications for membership, I'm all in.

Just name it like something you'd find from DnD.

Then it's settled, it's gonna be Software Engineering Bestiary.

Except in real medieval Europe, guilds and apprenticeships were not about thieves and wizards, but instead smiths, carpenters and bricklayers.

Well, any sufficiently advanced technology is indistinguishable from magic... and at the time this was as advanced as you get!

At the time, arguably some of the most advanced technology was the Gothic Cathedral. However, it was seen as Divine, not Magical.

What unions do doctors and lawyers belong to? Never hear of unions for these professions in the US.

https://en.wikipedia.org/wiki/American_Bar_Association - For Lawyers. A bit like for Doctors, they get themselves involved in the accreditation process of education facilities and then by extension the State Bar organizations.

AMA is the union for doctors

The AMA is not a collective bargaining association, just a professional organization. When doctors unionize, they become part of other unions: https://www.nytimes.com/2023/10/13/business/economy/doctors-...

And teachers.