Mutual intelligibility for the sake of information exchange is good, but we can have both. Most Europeans already have both. In the EU (the organization) it's Euro English.
The person above you has not said that mutual intelligibility is bad.
You want people to share their culture with you, yet you are fine with them throwing away something which acts as one of the backbones of their cultural history for the sake of an imagined increase in cooperation.
And also, why does everything have to be useful? The useless things in life are often the best. Like ice cream, poetry, wasting an afternoon away, or hacking. In fact that's why I work, to enjoy the useless things in life.
The person above you has not said that mutual intelligibility is bad.
You want people to share their culture with you, yet you are fine with them throwing away something which acts as one of the backbones of their cultural history for the sake of an imagined increase in cooperation.
And also, why does everything have to be useful? The useless things in life are often the best. Like ice cream, poetry, wasting an afternoon away, or hacking. In fact that's why I work, to enjoy the useless things in life.