tall: respect from all, advantage over others in literally every area of life, be seen as a leader, can have females attracted to him and cuddle/have gf/etc.
short: contempt from all, huge disadvantage even when applying for a job/finding friends and etc., can't have females attracted to him
in other words, the short guy's life is a ruin while the tall guy can at least lead a proper life. the "just apply for porn" advice of yours is so absurdly unrealistic, but even assuming that it wasn't in some alternate universe, you're still 5'3". maybe you're having sex with random females (whom are disgusted by you and are literally paid prostitutes???), sure, but you're 5'3". no one respects you, no one likes you, no one's attracted to you, you're looked down upon by all (both literally and figuratively)... but you get your dick wet by females who hate you. wow. what a big deal. it's all worth it.
if you care about fucking girls who find you repulsive, you don't need to be a pornstar to do that. go hire a hooker with the 6'2" 3-inch-penis male.