I don't agree that marketing is more important than products or services. Marketing that generates leads is only effective if the product or service is good; if not, it will only become shills. I have seen one product have a great marketing campaign but eventually fade because of the ineffectiveness of the product, so yes, marketing is powerful, and it comes in many forms, like coming from influencers and coming in the imaginations of the marketing agency.
So before you start your marketing campaign, be sure that you have a good product or effective service that will make the customers come back, or else the marketing is useless.
That is a 100% correct. It is a myth many people and business owners have that if they have strong marketing, they will generate sales regardless of the quality of their products and services. The only way you can generate constant sales in a business while having average products and services is to spend too much money on marketing and the marketing will need to be ongoing which means that you will stop getting sales as soon as you stop marketing your products, which means your business won't generate organic sales which is what should happen after some time when you start marketing your business.
A business with good products and services will generate organic sales after some time. The reason behind that is that people who use your products and services will refer other people and recommend your products to them, and this continues as long as you are making good products and providing good services. With good marketing but bad products and services, your business will only stay afloat if you are constantly spending a large amount of money on your marketing campaigns to get new customers every time because you won't have recurring customers with those products.