I'm not entirely convinced by that statement personally.
I do think there has to be a slight change in mentality at Spurs that probably reflects where the club want to go and if they seem themselves as a club who should be winning more cups, I would also question if a club value a League Cup win for instance v a lot of the body of work Pochettino has put together i.e I doubt they would take the Mourinho "winning" season over what they achieved last year, one of those seasons is a far better body of work yet the one that is didn't end with cups because in this day and age in the EPL there is more depth to it than that.
In order to compete in the EPL with City and Liverpool the reality is a summer most likely needs to look like that which they have just had as opposed to windows where they haven't spent
If it hadn't been for the talent of their previous manager to develop players at the rate he has done for them they wouldn't be close to the level they are currently at, it would be easy for them to fall off a bit in all honesty, as they are where they are predominantly due to an insanely good level of player development.
I would seriously question if Kane, Ali, Rose, Tripppier, Winks, Dier exist at the level they do if they had been working under a lot of other coaches - that is development to the tune of about 400 million quid he has added to that squad that wasn't "spend" as such, it is mainly because of that development Spurs have lived at the level they have managed to in recent years rather than a right to win things, takes work for them to compete in the EPL in this day and age.