Moving a plant thousands of miles just because it might look pretty in the garden is not natural which is what happened with Himalayan Balsam and Japanese Knotweed and to say it is is bizarre. People brought in the grey squirrel for the same reason. They were moved over distances that nature could not do.
What is sybiosis?.
Modern man is not generally regarded as part of nature. The natural world is the bit that exists without man's intervention. I sometimes wonder about at what point in our human development we stopped being part of the natural world
Man not part of nature ? Whose definition are you using (surely not the "And man shall have dominion over all"?) quote from the bible!
Sybiotic was an obvious typo, your reference to it doesn't display a good example of netiquette

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A man pulps wood and manufactures paper (artificial)
A wasp pulps wood and manufactures paper (natural)
A man preserves fruit by manufacturing a heavy sugar syrup (artificial)
A bee concentrates sugar into honey (natural)
A man cultivates crops (artificial)
An ant prunes and manipulates fungi to increase fruiting heads (natural).
I could go on all day

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Even the bower bird creates a bower decorated with "Pretty" objects to impress a potential mate !.
Like it or lump it , things are and will continue to be moved around the planet, if the situation suits ,then over growth will happen ,in the fullness of time a balance will be struck.
The world has been in a state of flux since its inception , it relies on change in order to survive.
I'm afraid "the weakest go to the wall" applies today as indeed it always did.
John Wilkinson