Basically what these macs are advertised to do. Photo editing, video editing, working with large design files, 3d modelling, ML models, I could go on. Good luck doing any of that on a 8GB machine.
Most professions require the use of computers in some capacity, but I would strongly suspect that the vast majority of this usage is “communication and administration”, i.e.
1) sending messages/emails/documents to colleagues, customers and suppliers
2) reading information in web sites, PDFs, or internal company documents
3) using web-apps hosted on the internet, via cloud service providers, or hosted on corporate servers
4) Creating documentation and presentations
5) possibly using some kind of specialist software for design, accounting or some industry specific tools
6) Maybe some web site development, scripting and system administration
Nearly everything can be done via a web browser these days including software development, server administration, photo editing, office productivity and enterprise applications.
These are all professional uses of computers that do not require a lot of computing power. The number of professions that require a lot of power is tiny compared to the whole. Exceptions include Creative arts & media creation, some science and research, some engineering tasks, some software development tasks. They are a very large number of professionals who just want a reliable high quality machine, but do not need to any significant horsepower