You might be confusing 'juicing' and 'blending' here. The former removes a lot of fiber, as you said. The latter does not. Blending does affect the mastication

You might be confusing 'juicing' and 'blending' here. The former removes a lot of fiber, as you said. The latter does not. Blending does affect the mastication phase of eating, because you're drinking now, not eating - so you get much less of the enzymes associated with that process to help with digestion. But then again the blending process have done the bulk of mechanical digestion before. Modern fruit and veg are intelligently designed and optimised for calories and aesthetic appeal. Not nutrition. They have little in common with original rootstock. What you know as an table apple is a single mutation that has been diversified over time. Original apples are only good for making booze. The healthiest food is green leaved veg. Baby spinach and the like. I build massive salads with these as base and add whatever to that. Very digestible, no need to blend and while it will never be a pizza, it's not bad at all.