When the ball is inches from the keepers gloves, and the striker is 5-6 feet away, what do you think the striker is trying make contact with when he launches himself towards the keeper?? The ball?? Don't make me laugh!!!
There is no doubt that the keeper will get to the ball before the striker in this case (because that is what happened). The fact that Bazza collected the ball and still got out of the way in time confirms that the striker stood no chance at all of winning the ball, yet still he made a reckless and dangerous challenge, having no regard for the consequences of him doing so. In so doing he made contact with an opponent. It was a foul. It was "a tackle" (loosely defined) from behind. It was a red card. End of.
We have seen plenty of sending off's in the Premier League this season where the ball has been won in a tackle, but it is the follow through that strikes the opponent and causes a foul to be committed. This present case is much worse. There was zero chance of winning the ball. We can say that because he didn't get anywhere near it. At all times the defender is between your striker and the ball. Your striker cannot get to the ball without fouling the defender.
Your defence of your striker is as brainless as the challenge that your striker made.