Because he's better than the midfielders we've been linked with

This is a really weird one
He has 6 assists and 2 goals for Everton, Rice has 4 assists and 5 goals for the team at the top of the table and he was £100 million and is their contender for player of the season
Garner wins the ball more, plays more forward passes and more progressive passes. He has 1 less combined goal and assist in the league this season despite vastly inferior players around him. Rice is more of a goal threat himself and Arsenal rely on his set pieces, even though he's set up less goals than Garner. Rice is better at dribbling, while Garner is better passing.
No offence but it just seems like you have no idea about the player