Because the people whining own $6 million lake front homes and are likely just spoiled rotten instead of having a real issue. Even their own decibel readings are directly under the bridge, not from inside the homes. To "fix" the issue, they want to slow the trains down for 6 hrs/day, including during the morning rush hour, which will effect 10 of thousands of people daily.

Its just very rich people being mad about having "the poors" anywhere near their homes. Its why mercer island fought bus depots and the light rail for years. They dont want other people using public space that they feel like they deserve to themselves.