Why is this plant thing so hard to understand for you? Drich, mind sharing where is the level of your biology education? It's easier for me to explain that way.
As for why plants lose the "ability" to process high amount of light. This is quite simple, it takes energy to maintain light sensitive cells, energy that may be better off expended elsewhere. There's a balance in everything, when it becomes too costly for a plant to maintain this level of capabilities the trait will be selected against until there is a balance.
Kind of like how even though speed is a great thing for a cheetah, they don't go supersonic. Because the energy is needed elsewhere.
As for why plants lose the "ability" to process high amount of light. This is quite simple, it takes energy to maintain light sensitive cells, energy that may be better off expended elsewhere. There's a balance in everything, when it becomes too costly for a plant to maintain this level of capabilities the trait will be selected against until there is a balance.
Kind of like how even though speed is a great thing for a cheetah, they don't go supersonic. Because the energy is needed elsewhere.
