RTP and house edge describe the long-run maths, not what you’ll get back in one...
https://online-wiki.win/index.php/How_Can_the_CFA_Institute_Framework_Apply_to_Casino_Math%3F
RTP and house edge describe the long-run maths, not what you’ll get back in one session: 96% RTP means a 4% house edge on the amount wagered