The last time I checked (which admittedly, was a while ago) we had a lower PPG without Kane, and a higher loss rate in the league. As well as scoring less per game. Either way the sample size is too small without Kane, and there's no way you can reliably state we are better without him based on a handful of matches.
And he's a flat track bully who has scored against every team in the Premier League, and has one of the best goal to game ratios of any player in CL history. So all in all not too shabby.
Limited I can get on board with .. to an extent. He's a player who requires service as he lacks explosive acceleration, athleticism or dribbling ability, so can struggle to create his own goals aside from his elite shooting ability in and around the box. Getting space for those shots consistently is tricky as he isn't agile.
If the team is operating at a high enough level around him, he can be relied upon to score more goals than almost any striker in the world. But he needs that service in to him and without it he has a tendency to drop far too deep or be on the periphery of games.
The way you talk about him though, you'd think he was a Janssen who could score tap ins. It's over the top.