In modern day football that is true of most successful managers.Simon Jordan has made some astute observations about Poch over the years.
Chiefly, hes not actually "achieved" anything beyond the tools given.
The most successful managers have the budgets to sign the best players.
In fact it could be argued that Pochettino had no chance at Spurs because they completely stopped spending while the stadium was being completed and that more than anything was responsible for Spurs falling back from being a top 4 team.