Well, Kaawumba literally has to post this every season, this post containing everything Blizzard has officially ever said about comp and matchmaking. This includes posts that flat out state that SR isn’t used at all in matchmaking (only your MMR), and Jeff’s statement about MMR working the same way SR does and that unless you’re decayed, your SR is more or less your MMR.
And then people don’t want to believe it, and would rather believe posts about handicapping or forced wins/losses in which those posts have nothing but BS content.