I know it's safer.
But most of the time, I think players will play on their device and stay logged. I'll disconnect only if I play on a shared device (that never happens in fact).
I was curious to know in concrete example why someone would do it, I doubt a lot of player disconnect of their personal devices, but I might be wrong
If anyone except me always logout, then the button is not enough visible. If most players are like me, it's understandable that it's not the most easy-to-access function.