Tree trimming may prolong a tree's life temporarily; however, if it's severely damaged or diseased

https://pr.timesofsandiego.com/article/JandJ-Treewackers-Issues-Summer-Tree-Service-Safety-Advisory/6a46e87a955bea00027f64c9

Tree trimming may prolong a tree's life temporarily; however, if it's severely damaged or diseased, complete removal is often the most practical solution.