Why won't the bank finance E-Commerce, Amazon businesses, Other BS business opportunity offers and all the other things that are commonly sold as business opportunities?
It's because they are risky and the bank has no recourse when the venture fails.
When it comes to Real Estate. Banks advertise with the hope of being able to give you money to buy it because they know, over time, the value will go up and their investment is safe because it is secured by a piece of property.
The interest you pay on your purchase? Tax Deductible!
If you invest $100,000 in stocks, how much stock do you own? $100,000 worth.
When you invest that same $100,000 in Real Estate, how much can you buy? If you finance 90%, you can get a $1,000,000 (One Million Dollar) asset.