Let's see a show of hands. How many out there have been to an art museum or gallery and seen a piece of work and said or heard someone say, "I could've made that!"? Be honest. I've heard it... and said it... dozens of times. Now I rarely say it anymore. Almost never, unless I'm on Etsy. When I would say it, though, I was at a point in my life when I knew everything and could do everything and anybody that told me otherwise could... I was young, and lacked experience and appreciation. "That's just a few brush strokes!" or "Come on! It's just a solid square on a canvas!".
I wonder if it's possible for somebody to learn to appreciate without experience. Would that make them a genius? Art is too often a victim. Unfortunately by the time one may understand and appreciate the work, the moment has passed. Although, art is awfully demanding. Art expects you to know not only about it's creator, but also of the environment in which it was created, the political climate and what other artists were doing at that time. That's a full plate.
Is it important to know that Constructivism was born in 1919, Russia, and was the promotion of art for more than just social purposes? Yes. It produced new ways of thinking about architecture, graphic and industrial design, film, and so on. It might also make you ask why that is. That would require further reading and learning about what was going on during that time. The achievements, the mistakes. Ah, now we're getting somewhere.
So,the next time you see something that "you could've done", I urge you to do so, you may better society.