Whilst it's true that digital marketing promotes business growth much faster and at a much larger scale than if you were to do it organically, it doesn't necessarily mean that you need to care about digital marketing.
For example: if you offer a very localised service where you or your customers can't travel far due to the nature of your service, then digital marketing might not be for you. Instead, local SEO
would be the way to go.
On the other hand, if you offer a service in which you can ship items, or you provide a digital service, then reaching millions of potential customers versus the few that follow you on your social media platforms speaks for itself as to why you should care.