very. wouldnt pass inspection if the whole system wasnt corrupt. typically you need to cut everything with a miter saw, table saw, hand saw, the proper tools for the job of properly cutting wood.
...they use chainsaws cause you can cut 10-20 beams at the same time. as aforementioned, it frays the wood, ruins its structural integrity, and allows moisture, bugs, and other bad effects to easily creep into the wood overtime, which will eventually ruin the structural integrity of your house.
this website will show you cutting best practices in a saw mill, but they apply anywhere - notice no chainsaws..and its a saw mill