Why should anyone "compete" on mobile keyboards? I used to have a couple third-party ones installed on my iPhone (Grammarly is one whose name I can remember)

Why should anyone "compete" on mobile keyboards? I used to have a couple third-party ones installed on my iPhone (Grammarly is one whose name I can remember) Found myself having to constantly go back to the factory keyboard so I could actually type (keytap-to-screen lag on some was on the order of a second or more) And some of those keyboards had ads Or exported copies of what I was typing off my phone No thank you