The number of people who are partnered vs single is 70%. If 60% of those met via dating apps, that's 42% of the total.
You're still not slicing thin enough.
If 60% of the couples who got together in 2022 met on dating apps, and people who got together in 2022 constitute 5% of all couples, that's still possible (and probable), then those couples will still only be 3% of the total. Pretty easy to add up to 11% that way when you start including all the 10-year-old relationships, the 20-year-old relationships, etc.
If it were flat at 60% for all years then no, it wouldn't add up.
But if you look at the area under the curve, it's still pretty small comparatively speaking because it's such a recent phenomenon. (And not every year would actually count equally for the whole data set, but it's displayed in this chart as every year adding up to 100% for its own year.)
When I was dating in the late 2000's and early 2010's, I remember adding dates as friends on Facebook, somewhere around the first date, specifically to be able to get a sense of their personality/background/interests, and to show off mine, even for people I met in person.
It wasn't online dating through a dating app, but online presence was still a huge part of the actual process.
Even before that, in the early 2000's, I remember stuff like AIM profiles that could at least link to photo albums that show off things that you've done recently. And even then having always-on broadband Internet, to where we'd be logged into AIM or ICQ, was its own flex.