RTP and house edge describe the long-run maths, not what you’ll get back in one...
https://www.quantifiedstrategies.com/rtp-variance-and-expected-value-applying-a-quantitative-framework-to-online-casino-gaming/
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