I think that you have already said it in your op post that investment and business are not the same, a business is an act of buying and selling that generate income for you in a weekly or monthly basis, while an investment is anything that you put your money in that appreciate in value overtime and gives you a return in the future.
That being said, you can rely on your business for survival, but you can't rely on your investment to survive because it takes years to give back a better ROI.
No, an investor makes money even when he is as sleep, while a business man must put in a lot of work physical and mentally for it to yield profit.