Please note that some of the links below are affiliate links and at no additional cost to you, I will earn a commission. Know that I only recommend products, tools and learning resources I've personally used and believe are genuinely helpful, not because of the small commissions I make if you decide to purchase them. Most of all, I would never advocate for buying something that you can't afford or that you're not yet ready to implement.
If my piece of content is so unique and valuable around hiking backpack recommendations, that other reputable outdoor websites are willing to link to it and build the page’s authority, then I’d have a very real opportunity to rank high in organic search for these search terms (meaning, my page will come up first when someone searches for hiking backpacks).
I have several blogs promoting all different products. The hardest thing I find about affiliate marketing is that once you’ve sold someone something you need to find a new product to sell them. I’ve found that promoting a subscription service where you sign up a customer is a great way to go. This way every time they renew or buy something you get paid. You only have to sell them this once.
Now as to your comment on traffic it is true, traffic is important. But the truth is, acquiring traffic is easier than converting it. Plus we have many posts dedicated to traffic generation on this blog. Simply check this post, this post or this post. But must importantly, the reason why people struggle with traffic is that they try to promote a sales page or a heavily biased piece of content. Nobody wants to share that, nobody wants to link to that, and as a result you don't get traffic and blame your lack of success on traffic (like you did in your comment above).

Affiliate marketing currently lacks industry standards for training and certification. There are some training courses and seminars that result in certifications; however, the acceptance of such certifications is mostly due to the reputation of the individual or company issuing the certification. Affiliate marketing is not commonly taught in universities, and only a few college instructors work with Internet marketers to introduce the subject to students majoring in marketing.[37]

Tremendeous free teaching, that helps clear the smoke on what it takes to get an online business going. BUT, you concentrated on click bank and said nothing about getting my web site going and all the necessary details. I always thought the web site as a business sign telling people that xyz is open for business, check it out! Otherwise, people would walk and not even knowing that your biz is open. True?