You are confusing work with force. Taller people do not have to produce more force--they only have to produce it for a loner period of time in the case of your big compound lifts. This is what enabled the short Ed Coan to become "the greatest powerlifter in the history of the sport"; he was strong with a short ROM in his lifts.
Second, your conclusion that tall people will always have more potential and/or advantages in fighting does not follow from your arguements. You still ignore that if tall men were somehow stronger than short men, which is incredibly debatable, short men would still be inevitably quicker, more agile, have a lower center of gravity, and better equipped to strike a tall man's weak points (the groin, ribs, solarplexes, lower abs, etc.).
This was another point, Not part of the same argument.
If you have two fighters same skill,stamina,power but one is 4 inches taller than the other one , Do you think that his agility or quickness will play a role when the taller guy has the reach advantage?
Just take a look at Wladimir Klitschko 1.98cm/ 6'6" he is almost slender, He dosen't look like a giant ball of mass like the shorter guys not only cause it's harder for taller people to gain mass, Its mostly because he dosen't need to be buffed to defeat his opponents, He knows that he is a fighter not a bodybuilder.
He has a massive reach and delivers very precise hits.
Height really matters in everything to a certain point, There is a cut-off point of course, Depending on the situation or sport or whatever.
some examples:
Fedor Emelianenko
Record: 31-4, 1 NC
Age: 34
Height: 6-foot
Weight: 223
Style: Sambo
Birthplace: Rubizhne, Ukraine
Poll Points: 50
Antonio Rodrigo Nogueira
Record: 33-6-1, 1 NC
Age: 35
Height: 6-foot-3
Weight: 243
Style: Brazilian Jiu-Jitsu
Birthplace: Vitoria da Conquista, Bahia, Brazil
Poll Points: 45
RANDY COUTURE
Record: 19-11
Age: 48
Height: 6-foot-1
Weight: 220
Style: Wrestling
Birthplace: Everett, Wash.
Poll Points: 39
MIRKO “CRO COP” FILIPOVIC
Record: 27-9-2, 1 NC
Age: 36
Height: 6-foot-2
Weight: 227
Style: Kickboxing
Birthplace: Vinkovci, Croatia
Poll Points: 30
JOSH BARNETT
Record: 30-5
Age: 33
Height: 6-foot-3
Weight: 256
Style: Catch Wrestling
Birthplace: Seattle
Points: 29
FRANK MIR
Record: 15-5
Age: 32
Height: 6-foot-3
Weight: 260
Style: Brazilian Jiu-Jitsu
Birthplace: Las Vegas
Poll Points: 27
TIM SYLVIA
Record: 29-7
Age: 35
Height: 6-foot-8
Weight: 265
Style: Kickboxing
Birthplace: Ellsworth, Maine
Poll Points: 13
MARK COLEMAN
Record: 16-10
Age: 46
Height: 6-foot-1
Weight: 245
Style: Wrestling
Birthplace: Fremont, Ohio
Poll Points: 11
CAIN VELASQUEZ
Record: 9-0
Age: 29
Height: 6-foot-1
Weight: 244
Style: Wrestling
Birthplace: Salinas, Calif.
Poll Points: 10
MMA'S ALL-TIME HEAVYWEIGHTS
Did you see anyone under 6'0" ?
There is only one guy who is 6'0"... the others are taller.
Height=more potential/advantages in most sports.