The gap between S4 and S1 is larger then the gap between B1 and S4. The Tiers are a progression system made to Feel rewarding gets folks to grind for a goal.
Skill biased MM is about probabilities and its built around Class intervals. I tend to go on tangens about the topic so if you want to hear about it let me know.
Using your assumption that you have to be Far above? I tend to make high gold and Low Plat MMR. I am by no means diamond or Master level of skill. I believe its obtainable to rank up with out needing to be grossly over skilled and it sounds like you don't?
You have contradicted yourself mate, I don't mind giving you a bit of wiggle room if your frustrated.
"skill has little to do with climbing" vs "you shouldn't need to belong in gold to go to silver from bronze, and you shouldn't need to belong in plat to get to gold from silver"
If you feel skill matters but the required amount of skill to climb is a large gap? That's a better conversation to have.
As far as the bit about "If you want to hit say silver 2 you should need to consistently carry 4 people. You should only need to carry yourself." Its a team game?