Wow, I'm not even sure why this turned apparently personal
My point is that skimmers perform nutrient export, but is not the only way to skim the cat as someone pointed out. One way is how you stock your tank. It is not a unheard of that many people skim to overcome how much bioload they can have otherwise, in fact, that might have been one of their main purposes as most tanks are indeed overstocked to some degree. But if you choose to not run a skimmer you have to compensate by potentially stocking less. Other ways to export nutrients equally have already been stated too, such as I did with macroalgae and soft coral harvesting.
Skimmerless almost 2 years now and my tank is never cloudy. There is some particulate matter, but this is not removed by a skimmer anyway. Nutrient removal is essential, but there are many ways to do it. Not to mention, many folks using Prism and other small skimmers aren't that much further from being skimmerless anyways (I was)...they just don't remove that much.
*self-edit--Oops, I thought I was misinterpreted but took a wrong guess. Sorry if this seems like a duplicate of my last post, I was trying to explain better *