Trees don't get 'cut down to make guitars', and the vast majority don't use 'exotic woods'.
Wood is sourced from timber yards. The stuff guitars are made of are what isn't used to make furniture.
As I said, in the grand scheme of things, the guitar industry is small. It's not a top priority for 'the best wood', and let's face it, the vast majority of guitars are made of the cheapest woods available - maple and alder are a long way from being exotic, and not that many use rosewood or ebony anymore.
I think it depends on what you call "exotic". If you mean by that wood coming from rainforest areas, I'd assume one would be suprised, how much of that stuff is used in chinese guitar making, the biggest producer of such things in the world. Also, the use of rosewood may have been more limited since Cites II, but the numbers went up again when the exceptions for MI were made, even if they are not up to the numbers, they were before Cites II.
It is imho more intimidating when you think about, how cheap the wood must be, to make a 89$ guitar profitable, incl parts, paint, work, shipping , packaging and marketing. It must be the cheapest stuff you can get. And if it is that cheap, it cannot be harvested ecologically responsible, no way. And even if guitar manafuacturing is small compared to furniture business, it still is big.
Did you check pallets or BBQ coal lately? You would be surprised that you can find "exotic" wood used in there. Illegally harvested maybe, or from other shady sources, no matter, as long as it's cheap, I guess.
Here in Germany there was a time, when the cheapest hardwood staircase you could buy was made from mahogany, solid mahogany (well and their relatives Meranti etc.). That was the cheapest hardwood option. And that stuff came from South America . Nowadays people renovate their houses and throw the wood away, or sell it dirt cheap and a lot goes through the funnel. For me it gives a never lasting source for great wood to build more guitars from, than I could ever need.
I guess what I am ranting about is, I would love to see people become more aware of the resources they use and the impact it has. As @jvin248 already stated, one would wish that guitar players would be more open to accept wood as a natural product, that is always unique and may have optical flaws, which won't make a guitar anything worse than one, that may suit our visual standard better.
Taylor made it happen with ebony, people accept striped ebony now and even pay a premium for these unique patterns. Would be cool if that could happen with other wood as well.