Elionoxa, "...however apart or close the trees..." is the understanding error. It's really not about the distance of the trees as it is the angle of the suspension coming off those trees.

If the hammock has a built-in bug net, the manufacturer has set the ridgeline length and hammock sag. If you add a ridgeline yourself, you usually start with a hang angle of 30° and adjust to get a little more or less sag until you find what works best for you; then you make a ridgeline that keeps the hammock ends the desired distance apart.

So the key is keeping the hammock ends the same distance apart. As long as the distance between the trees is further apart than your desired hammock end distance, you can attach/suspend at whatever angle the setup requires. If it is shallower than 30°, much more force than your body weight can be applied to the suspension, but the ridgeline and your suspension hardware, not the hammock fabric, absorb that extra force.