".... technology is difficult and requires a long-term stable world with the right ingredients for technology, and both oceans and land. This is not as simple as it sounds..... "

LOL. It's interesting you should say that, because access to space on a large scale requires a more stable world than we currently inhabit. My best estimates put the construction of a Skyhook at 38 years, with an annual budget of about $30 billion, and eventually the cooperation of every nation worldwide for airspace, airports, and aircraft so that the Skyhook can be used to its full potential.

Even beyond that.... imagine how long-term and stable we would have to be to make interstellar travel possible?

There probably are species out there that would be delighted, but at the same time very disappointed in humans.