why is solo queue ranked not affecting other queues?

literally the title. 90% of my unbalanced games are when high ranked players queue up with their friends and it places diamonds / plats against silvers / golds.

arams ive found dont seem to matter. and i dont do 3's or dominion. ranked 5s teams dont take into account solo queue status when deciding on teams in placement matches.

just played 2 games with some friends (working on getting the ward skin) both games were against diamonds / plats with 1 silver and 1 gold. our teams highest ranked player is in gold.

i know im the weak link here but i feel going up against a diamond 5 is not something someone who is silver / gold should face. especially if only because the enemy team is in placement games.

i would like to hear thoughts on this.

this is in gameplay because matchmaking is part of gameplay. im so sick of this problem.

give me any good reasons solo queue ranked on rift should NOT influence other rift queues. and saying it would make queue timers too long for high level players is not a good enough reason. if they want to play another queue with shorter timers it should not be at the expense of their opponents. i dare anyone at riot. youve restricted solo queue players from queueing up far apart. why not make weight the teams mmr towards the higher ranked players. especially when there are 3 on one team who are diamond plat and the opposing team isnt above gold.

@lyte you're the player behavior guy. you must know that repeatedly placing ppl against overwhelming odds is going to end in raging. for example i am extremely FU*#&%^ pissed off right now. this problem has been happening to me for a long time now. i rarely queue up alone just cause i let everyone else pick first most of the time and i dont enjoy bot lane. but with my friends.... plats / diamonds. sometimes we can win but not always.

ANY red who responds to this. either with their opinion or riots official opinion or naming someone who can shed light on this would be GREATLY appreciated. heck i would love for a pm or friend invite to talk privately about this. this is NOT my first time posting about matchmaking being crap.