Wow, yet another "pluck my leaves" post.
I'll be honest I did not read every comment in the thread, but thought I'd toss out my thoughts here.
If a leaf is green, it is photosynthesizing. Capturing light and making "photosynthates". For all practical purposes sugars that fuel the plant. A leaf is designed to maintain and support it's own existing tissue, and provide photosynthates to the rest of the plant to be used as growth elsewhere in the plant. Roots, stems, flowers and fruits.
So the good work a green leaf does, all that good stuff it made during it's efforts at photosynthesis, is moved all around the plant as the plant as needed. Translocation.
When a leaf is not receiving enough light, or becomes damaged, (rendered photosynthetically ineffective), by any one of dozens of reasons, and can't effectively photosynthesize, the plant will discard it. The plant is saying, "OK, once you were a good productive leaf and added to our efforts, then you got a little shaded and weak and you just took care of yourself, now you are adding nothing to this plant and have been voted out, as we are not a social welfare system type of plant. Here's your walking papers. We are going to suck out what nutrients you have left in you, you are going turn yellow and fall off".
Anyway if a leaf is contributing, the plant knows to keep it on. A big fan leaf up top is not "blocking" anything, it's your best photosynthesizer on the block and working it's ass off. All it's work is getting translocated to other parts of the plant that need it these photosynthates. If a leaf is not contributing, the plant will know when to discard it.
The cool thing is that these are your plants, and you are free to strip off all the big 'ol nasty green leaves you want to.