Not immediately. But small changes add up over a long period. Air travel is currently hard limited by the sound barrier & fuel efficiency. I can’t easily visit my family on the other side of the country for a weekend because it takes a full day to travel.

Faster travel time makes a lot of places feel much closer together, which I think is generally a good thing.

Supersonic flight is one example, rockets are another. Neither are commercially viable… yet. But people get excited about technology like this because these investments are required for it to be possible in the future.

Saying it’s not a problem worth solving is ridiculous. You’re suggesting that humanity is never and should never get faster at traveling between point A and point B. But many places on the planet are still very far apart.