Kane has not delivered in finals, but neither have his teammates, in fact the CL final was completely down to Poch and the way he prepared the team and the players he selected, and the league cup final last season was completely fucked before the game even started because of Levy sacking the man who might have given us the chance of overcoming City on the day. Levy did the same back in 2001 when he sacked Graham before the Fa cup semi against Woolwich. I would have backed Graham to have found a way past Wenger.
I don't think you understand how much mediocrity our team currently has. We are so far away from the great team Poch had 2016-2018. Our best players from then have aged, been sold/left, no longer producing what they did then, and our recruitment to replace them has simply been shocking. Kane leaving will be the final nail in the coffin because as I said we will not adequately replace him or his goals.