The reason is pretty simple. The technology you are using right now, was created with knowledge that was obtained in orbit.

If you use GPS, you are inherently reliant on satellites, delivered with rockets.

Some of our resource shortages can be covered via resource acquisition in space.

Pushing the space frontier, is far more interesting and important, than mobile phone screen size, or fidelity.

It opens an entire new area to the sciences.

Also big explody tube warms the cockles of my heart.