SEO is an ongoing, evolving landscape. I like to think of it this way: much like doctors practice medicine and lawyers practice law, I practice SEO. Over time, I have accumulated hundreds of domains and created websites to test new, old, or upcoming/anticipated algorithm updates to test first-hand what works and what doesn't. These websites also allow me to pinpoint what elements of a website are affected by Google algorithm updates when they are released.
Also, its possible that I may not be the best fit for your business needs! Instead of wasting our time, I am more than happy to refer you to someone who can provide what you need. I only carry so many clients at any given time - this allows me to devote more of my attention to the individual needs of each one and be available for anything that may arise. I stay in contact with my clients via slack, email, text, skype, etc.