I don't really know how to explain it to you if you're unable to understand how a team like Spurs that's only won 2 top division championships and the last time they won it was the 60s, while recently dwindling around 5th spot, isn't something which is monumentally different compared to a relatively recent successful Dortmund side that have only been outside the top 2 once in 5 years, have won their top division recently and have 8? top division titles.
You're arguing from a fan's perspective, when it wasn't them who made the decision but Pochettino.