Extreme/frequent top damage redistributes energy into lower branches.
Peel-away/split damage is often the result of one side in a forked tree giving out from uneven weight distribution between forks and seam failure. The junctions in a forked tree accumulate debris and moisture which lead to rot.
Douglas-fir
Maple
Alder
The left fork of this fir is larger, with unevenly distributed foliage, and an outward lean. It will likely be the side to fail. A bulbous seam is expanding where the two trunks touch.