the current transaction fee is $5, if we use segwit it will be 34% cheaper, $5 x 66% = $3.3. so, we still have to pay $3.3 transaction fee even we use segwit. consider bitcoin adoption will rise in the near future, the fee will easily rise over $5 even for segwit transaction.
people may argue that the Lightning Network(LN) has already been implemented by then, then we can utilize LN to enjoy low fee transaction. but in the end of the day, we still have to use on-chain transaction to transfer bitcoin into the LN, and then transfer bitcoin back to the blockchain after finish using them, therefore we still can't avoid high fees no matter what.