The graph is misleading because they group PC and consoles together against mobile. That implies mobile would slaughter both of those segments individually.
It's also missing some very important markets like Japan and South Korea, presumably included in "48 markets multi-market average" but not explicitly shown individually. Makes one wonder, eh? :V
That didn't sound correct to me, and I found an article [0] that says the numbers are pretty similar.
I play some games on PC+PS5 and some on mobile, so I'd probably count as both a mobile and "legacy" gamer, but if I had to choose one gaming market to immediately disappear from the face of the earth, it would be mobile gaming for me, absolutely.
[0] https://business.yougov.com/content/48108-console-vs-mobile-...