I can understand why people wouldn't expect them to win the title, but why won't they make the top four? The other teams aren't any stronger than them. Can you say that Manutd, Chelsea, Arsenal etc. have stronger teams than Tottenham? It seems weird to dismiss the idea of getting top four.
Kane and Son are better than anything the other teams have; then you have to take into account the possibilities of Bale (get him even to half the player he was and they clearly have the best attack of the top four contenders). Their midfield has good players like Ndombele, Lo Celso, and Hjobjerg; no worse than us or Chelsea, to be honest. Their defence isn't great, but neither are ours or Chelsea's defence.
They very much are in contention for the top four, no doubt about it.
I don't think winning the title is so out of the realms of possibility, but if they did manage it, it would probably be Mourinho's best win ever.