True but you can buy wood blades for angle grinders.Like this one?
https://www.harborfreight.com/3-in-heavy-duty-electric-cut-off-tool-61944.html
I use an angle grinder like this with a cut off blade on 14ga fencing:
https://www.harborfreight.com/4-12-in-7-amp-small-angle-grinder-62556.html
Blade that will cut metal is not going to work well on wood, green or dry.
Use a hand pruning saw for those.
Apologies to @anatess for hijacking your thread into a chicktoolchat.