generally tieing down a plant in growth is to achieve two things!
a mother that produces lots of clones from the untill then budding or branching points,
or to maintain a large area with few plants and keep it low, this can be done by growing under nets,
the idea of trimming the leaves in half by cutting hoizontally across all the palm leaves and trimming of any side branches is to grow a single cola, or bud!,
this is the method used for sea of green,
the time in grow is spent concentrating on root development NOT grow!
hence the need to photosynthasis is greatl reduced, slowing down the plant in this way induces more internodle growth, ready to become budding points, and form one big bud with no branches, it is imortant to say that once the plant goes from grow to flower that nothing is cut from the plant!,, NOW it needs all the foliage it can grow , and as it has still a third more to grow at least during flowering, and a massive root structure, the new leaves will be thick and healthy and provide everything you need for sog!
as far as stressing the plant is concearned , stress isnt always a bad thing!,,, we all remove and cut leaves in the same way to produce clones!, and controlled heat stress i at the tip of the plants can be explosively good!,
use stress dont fear it!

welcome to the world of endless possibilities,,,,,hydroponics