Gyokeres performed at a much higher level than Rogers for a couple of seasons and still went for 20m Euro or £17.1m.
How can you say that Morgan Rogers is worth £15m+ now? Basically the same as what Gyokeres was in the summer,
There is an argument that you think he will become a £15m+ player over the next two seasons like Gyokeres did and to hang on to him but there's no way anyone is paying that now. That would be a gamble. Rogers isn't performing anywhere close to that level right now. I don't think he'll get to that level personally.