I'm a foodie, so I immediately think about restaurants with massive menus vs a tight menu of items they excel at. Nobody know Thomas Keller's name because he asks everyone that comes in what they might want to eat. He develops a menu and serves it.
Are you going to get better cuts of meat from a butcher shop or a grocery store?
Would you rather be a handyman or a specialist in a trade?
Would you rather be a neurosurgeon ($750K avg. salary) or a general surgeon ($400K average)?
If I want ski gear, I'm not going to a Dick's Sporting Goods. I'm going to a shop that specializes in alpine sports.
There's obviously businesses that have had success trying to have broad general appeal (Walmart, Target, etc.). But I don't think I'm going to get "The best" of anything from those places. The tradeoff is convenience for deeper selection and expertise.
This is just worthless hype, like covering the windows of an otherwise empty store with giant SALE posters.
BUSINESS
A restaurant for example, requires investors, mortgages/loans, multiple licenses, inspections, real estate holdings, commercial supplier relationships, managers, licensed servers (bar tenders), and employee managers, and other directive staff., plus advertising, an ALL under a pressing timeline.
None of that exists for a DJ - No license, ZERO up front investment, no office, no physical location at all. As a result - anyone who can develop even a basic talent for events or venues can start work immediately., I know, I've trained DJs. I was initially trained by someone else and started with no personal equipment and no music collection. Night clubs, mobile, etc. I was a college student, and it was years before I went on to do my own thing with my own resources,
TALENT
I would simply suggest that "DJing" is not a business at all. It's simply a craft that can be put to work in other businesses. Those businesses may be night clubs or other venues, or actual entertainment bureaus/agencies that do event planning and entertainment booking,.
Being a contractor doesn't alone make someone a "home builder" or developer. Likewise, the tax status or legal organizational form is irrelevant when a DJ is essentially a solo-op working part time with shallow resources. If our van breaks down - there's no one to call, no one to replace us. We have a true emergency and possible no show if we can't find an instant solution to the stark reality of our resources and fulfillment capacity., That's not a true business because it represents an imminent cliff that no real business would ignore.
I stopped promoting myself as a "DJ" years ago. I'm TALENT. Most of the time now that talent is technical, industrial, or creative, but it was always there even when I was focused simply on the performative role. When a venue approached me about being the "House DJ" I didn't hesitate to say yes. I also recommended they hire at least one other company in parallel so customer's had choices other than simply whom I alone had available, It was steady reliable income for more than simply weddings, a great source of continuous referrals and references, and steady work for other DJs working with me. It really had no impact on my ability to continue with my own preferred bookings, No one was requires to use a "house" DJ - it was simply an option to help people manage their costs and utilize services already vetted by the venue itself. For me, it gave me wider access to many more 'off season' and non-wedding bookings that were otherwise never going to intersect with my advertising in that per-internet era.