My employer is headquartered west of China, in Europe, so is probably part of "the west" as you call it. Banks are absolutely not centered around mortgages (only): this is what YOUR life is centered around, the middle class is composed mostly of employees savings for their home, the main source of their wealth. It is the case in the "non-west" like in China, very much so, but is not the only business of banks.
My dad had a small business in France, and all banks were ready to lend to him, no problem, with a competition on the rate. They would ask him for his business plan, discuss a bit, try to time the loan with their own need, increase the rate if it was a riskier plan. He did re-negotiation, emergency loans, growth-centric new loans, renovation loans, in several banks for over 30 years until he died last year and... one of his employees took a business loans to buy back the business for a million euros from us, his heirs.
How do your bakers, dentists, auto-shop people finance their business ? It cannot be cash-only, family-only, or lying on fake mortgage applications... Maybe your country is really special ? One thing maybe... I don't think banks advertise these very much on their website or whatnot, so maybe you have the impression it doesn't exist ? Usually people with small businesses have some accountant contacts first, then start having contacts in every bank's business loan division and they just meet directly to discuss. At least that's how my dad always seemed to do, when he did his "bank tours" to finance a new project.