Tottenham management has no desire to win the title. They are not interested in spending money and buying players. Every season they depend solely on the performances of Kane and Son. So Harry Kane will never win the title with this team.
Bayern Munich is the best team in the Bundesliga. The team also has the potential to dominate the Champions League. If harry kane can perform well with this team he will easily win the Bundesliga. At the same time, there is a possibility of winning the Champions League title. And so Harry Kane should join Bayern Munich.
Totenham has quality players. I mean they spent to buy players unlike what you said. Just check the front line of Totenham squad. They have;
1. Harry Kane,
2. Son,
3. Richardson.
These are quality players that can get any amount of goals to give a team title win. But I don't know what to say about Totenham. Ot could be that the management is the problem.
Richarlison played 27 matches for Tottenham, but he managed just one goal and one assist in the entire season. He is still young. So don't expect too much from Richarlison.
Son Heung-min and Harry Kane can be considered as Tottenham's main players. But a team's performance is not stable only if the front line is strong. The defense and midfield need improvement. Last season Tottenham conceded 63 goals. It is easy to understand that Tottenham's defense is weak. And Tottenham never prepares big funds for player purchases in any season. And so Tottenham cannot compete with teams like Manchester City, Liverpool or Arsenal.