Hammering can get loud. But not louder than any motorized tool. And hammering being limited by the energy capacity of flesh and blood doesn't last for long bursts, maybe a few minutes at a time. In contrast, motorized tools let out an egregious, sharp hum that can last for an hour or two without pause. Both might draw someone's attention and frustration, but when comparing them objectively, one is clearly worse than the other.
On top of that, carpentry is done on site and isn't mobile. Someone doing carpentry as a hobby will likely be in a garage or some enclosed space that absorbs and muffles the sound. Carpentry being done professionally is temporary and will stop once the construction is finished. Landscaping, though, is everywhere and without end
I believe you that it was unintentional (and I'm sorry for implying that it was!), but I still think the carpenter was upset because you implicated him. Just to prove I'm not crazy here, I asked GPT as a neutral third party, which agrees:
On top of that, carpentry is done on site and isn't mobile. Someone doing carpentry as a hobby will likely be in a garage or some enclosed space that absorbs and muffles the sound. Carpentry being done professionally is temporary and will stop once the construction is finished. Landscaping, though, is everywhere and without end