Slippage is just a normal part of appointment-based trading at times. Sometimes it works against you, and sometimes it helps you.
Nothing is "always". There is not always slippage on every trade. It is most common on fast trades. There are many trades we take with minimal or no slippage.
Slippage is something we are aware of as we design the settings for our trades, but it's honestly not something to fear.
Our experiences have proven that there is both positive and negative slippage when trading appointment-based trades the way we do, and in the end, they wash each other out.
I hope that helps.