RE; Bilbos questions regarding weight

In professional boxing fighters strive to compete at the lowest weight their body can reach whilst still retaining energy and strength

Were a man naturally ten stone to enter the ring with a professional fighter at that weight, he would be seriously undersized on fight night.

Each fighter has a unique physique and each fighter will have their own optimum weight. Sacrificing two or three pounds at the whom of an opponent is very serious.
These fighters are proffesionals and spend weeks scientifically adjusting their weight. Nobody should willingly sacrifice 2-3lbs to an opponent