As a software engineer myself, I can tell you that building funnels from an application standpoint takes massive amounts of work. There's a great deal of coding and integration that's required here. From email systems to landing page implementations to credit card processing APIs, and everything in between, so many platforms need to "talk," that it takes the bar too high for the average marketer.
The better you learn and understand SEO and the more strides you take to learn this seemingly confusing and complex discipline, the more likely you'll be to appear organically in search results. And let's face it, organic search is important to marketing online. Considering that most people don't have massive advertising budgets and don't know the first thing about lead magnets, squeeze pages and sales funnels, appearing visible is critical towards long-term success.
In the last 10 years, ShoutMeLoud has inspired millions of lives around the globe to help them earn passive income via affiliate marketing. It would not have been possible if I had not quite my call-center job to pursue my passion. When I think about this, I find it amazing as for how my life unfolded when I took the courage of starting something of my own.
For example, when a customer finds you organically through a Google search for example, that means you have some element of authority. When you have authority, prospects are more likely to enter into your funnel because they know that if they found you relevantly, that whatever it is that you're providing must be of a great value. That's just the nature of SEO and organic search.