nope segwit does not.
stick to reality.
EG old expection of 100% lean tx is ~4500 TX @ 7 TPS
new expectation of 100% segwit usage using REALISTIC transactions is ~4500 TX @ 7 TPS
expectations and reality wont be ~4500 TX @ 7 TPS
You're the one outside of reality. There's is at least 1 known Segwit block on testnet that has >8000 TX. According to your invalid knowledge, it was created by magic since the limit is 4500TX.

Magic
14.8 TPS:
https://testnet.smartbit.com.au/block/0000000000000896420b918a83d05d028ad7d61aaab6d782f580f2d98984a392