Why didn't they keep LHW at 161-175 lbs?

$

 

This is the correct answer, but the pretense for doing it was that the original weight classes were spread out too far, so that intermediate classes were needed.

 

Same reason we have four champions in ever division. More money

 

It became the only one of the original eight divisions without a tweener division, right? (Other than heavyweight as there’s nothing above it, obviously.)

That’s a pretty big gap in poundage from 161 to 175 as compared to all the rest. I think it made sense. There have been enough top fighters who were too big for middle and too small for light heavyweight to justify it.

 

If you're looking for a good reason this discussion won't go anywhere cause there ain't one.