Exactly. I used to use Ecosia instead of Google for my internet searches, thinking that their planting trees would be a good endeavour. They do plant trees, but they can't guarantee them to actually grow to be "useful" trees. So ultimately, while I did contribute to a bunch of "trees" being planted, it probably didn't make too much of a difference after all.
We can afford to spend way more money on this and really make a difference, just like the peace corps did in the 1930s. We still see the effects of that across our state parks nationwide...