RTP estimates long-run returns; the house edge is the casino’s expected share....

https://rowansnewthoughts.quantlynix.com/posts/what-s-the-difference-between-house-edge-and-casino-profit

RTP estimates long-run returns; the house edge is the casino’s expected share. At 96% RTP, it is 4%. Volatility shapes how wins and losses arrive. In a short session, results can swing far from the average; RTP won’t predict your outcome.