why lhws always wins against hws?

Your reasoning is incorrect.

JDS lost to Joaquim Ferreira as a light heavyweight, but JDS was himself a light heavyweight; also JDS beat Joaquim first, which makes them even (one win each against each other).

Fedor lost to Henderson yes, but he is past his prime, and he has beat other top guys who were considered light heavyweight, such as Matt Lindland.

Cormier is NOT a lhw , the guy is almost 250 lbs, and has always competed in MMA as a heavyweight.

Alistair Overeem had some loses as a light heavyweight, yet none as a heavyweight, which is contradictory to your point.

no id say most stacked and strongest division is WW or LW

ww has: gsp, shields, koscheck, story, brenneman, aj, fitch, hendricks, condit, diaz, ellenberger, rory,alves, kampmann, diego, and bj. very very stacked division when you got guys like kamp and alves who are elite and kamp beat condit who is inline for title shot, and kamp isnt even top 10 that tells you something. Not to mention former top 10 guy daley is just 1 fight removed from being a former top 10 guy, yet he tko kampmann standing! and kamp almost beat shields, and shields is no joke, and shields was just tko by a solid guy like ellenberger who will probably destroy diego next. and hendricks is a up comer about to destroy fitch in my opinion and a young and athletic and strong and powerful ww who is ever improving.

lw has: edgar, maynard, melendez, aoki, bendo, alvarez, miller, cerrone, pettis, guida, guillard., lauzon,sivver.

problem is since ufc assumed # 1 organization position after 2007 collapse of pride. some of the best fights are either in SF which is now zuffa owned thus about to be UFC. so yes there are some very good LW who sadly are not under the zuffa umbrella thus id put WW above LW.

LHW to me is very stacked but not nearly as stacked. You got jones, shogun, machida, rampage, davis, gustafsson, mousasi, mo, gracie, lil nog, ortiz, bader,

and bader is not elite anymore

tito wont have to many more wins- his won over bader was a gift

lil nog- is not what he used to be

mousasi- is great but has to beat better fighters and has some holes in his ground game i think.

rampage- wont see the title ever again

rua- is on and off and likely will have to end his career if he gets injured 1 more time

machida- is crazy good

davis- is a future contender

gust- is a future contender, but needs more credible wins

Dan henderson- is not an elite LHW but is being talked about as if he is won due to the fact he Tko a former shadow of himself and non motivated fedor who does not fight like he used to.

Tko fedor who is arguably the GOAT and deff the HW GOAT is amazing. But if you see fedor and compare him to how he was from say 1999-2008 its not the same fighter. let alone he was declining in 09 but fedor now does not give a sh#t. he is apparently working out again and gaining back muscle like he used to .But fedor in his past 3 fights has come out looking to brawl and has abandoning his past calculated and smart fights he used to be engaged in. And now fedor just looks for a right hand in a brawl and thus he is losing sadly.

Alistair overeem: is a Former LHW and is now a HW he juiced or whatever and gained 40-50 pounds of muscle in under 2 years.

Fedor: is yes a HW and in his prime was 6'0 235-240 pounds solid, and when out of shape was 240-250. But Fedor in past years has dropped muscle mass and been a flabby 230-235 pounds. FEDOR CAN easily Fight at LHW and cut 25 pounds like forrest griffin or rampage do. Fedor could of easily been a very huge LHW and fought at lhw. but instead he decided on being a HW.

Big Foot: is a good fighter but was just outclassed by cormier in a fight he likely took to lightly.

Cormier: is MW size, in regards to frame. But could and should be a LHW sadly he cant cut weight no more because of bad kidneys.

there are HW who could of easily fought at LHW but never did. Cro cop, fedor, arlovski maybe, big nog, jake obrien was a former hw who went to lhw.

most of the best HW are not large HW they are under 250.

id say LHW in the past was most stacked but now a days its not really that stacked. if jones beats machida he basically beat the whole division and all of the talent and fighters it has. Davis is not ready for a title shot nor is gust outside of those 2 prospects LHW is lacking.