My spouse is almost the opposite of me in the privacy/FOSS realm.
They use TikTok and other social media, don't mind ads, use Windows, love Chrome and their Macbook, etc.
We've talked about privacy and FOSS a lot. They have the "I don't care if China/corpos/NSA mine my data, I have nothing to hide." Plus they like targeted ads and algorithmic content suggestions.
We have a lot of mutual respect for each other and I don't force my views on them, and they know I won't use certain apps. I gently suggest FOSS apps to them and sometimes they use them, sometimes not.
They also don't object to watching shows and movies with me that I "aquire totally legally" because I don't use streaming services.
I have told them that any children we have, I want to raise with a "FOSS first" philosophy, and they are cool with that.
Ultimately, I want my kids to have the choice of what software they use, FOSS or not. But for my part, they will know that I will only support the FOSS stuff, if they want to go proprietary, that's on them.