RTP is a long-run average; the house edge is the casino’s expected share: 96%...

https://brookssimpressiveop-ed.wordcanopy.com/posts/can-i-use-stop-loss-thinking-for-a-casino-session

RTP is a long-run average; the house edge is the casino’s expected share: 96% RTP = 4% house edge. Volatility affects how often results swing and by how much. In a short session, luck can overwhelm the averages, so outcomes may differ sharply.