Because Mister Offensive Tone, I know that there are trade offs to everything and sacrifices to be made with each choice. And I am not convinced that all that time I spent learning those other languages was spent wisely.
I have also noticed by moving to a country which is hyper focused on everyone learning many languages that it creates a ton of resentment and loss of other abilities, for example reduced STEM skills.
Right, learning many languages is subject to diminishing returns. European languages look barely distinguishable to me, so learning them would be a waste of time.