I take my black powder revolvers apart to clean them after they are shot every time. I take them apart, and put them back together fairly quickly without problems due to the fact that I have done so many times over.
For my double action revolvers I leave them alone. If it requires work inside I take them to the gun smith. I am sure I could do anything they needed to have done if had to. I prefer to have them serviced by some one that can do it better than I can, and is qualified to do so.
On a side note. Just because I can tear down, and rebuild an engine, or carburetor or fix most problems in my car does not mean I would attempt to rebuild an automatic transmission. I more than likely could do it. I prefer to have a transmission shop do the work though.
No matter how many times you do it and nothing happens it only takes something going wrong one time to kill you.