If Kane joins Bayern Munich in this season, he will get the chance to earn more achievements with Bayern Munich while he can never have the chance to win the Champions League title with Tottenham in this situation of this team, I think this transfer will help Harry Kane a lot.
Also, Tottenham can earn enough from this deal and spend the money to rebuild the team and race for the premier league while Bayer Munich can have a better performance in the next Champions League.
He's a good player at a bad club, that sounds very harsh but that's the truth, because so far when he has been loyal to this club, relatively the best achievement for Tottenham is the champions league final without ever winning, even in the Joan Gamper tournament today they still can't win because they lost to Barcelona even though it's not a prestigious tournament, moreover the champion league will increasingly look impossible for Tottenham to be able to win, moreover this season they won't have European competition, and players with abilities like Harry Kane shouldn't just play for domestic competition only.
For some reason it is very difficult for Bayern Munich to get him even the value submitted is high enough for player, because if Munich manages to get him then in the Champions League Kane will be able to help Munich to score goals because several seasons in the Champions League after winning last time Munich did not get such good results and it became even more difficult to compete when Lewandowski chose to join Barcelona.