A little bit of knowledge is a dangerous thing!
That is why I want to see DIY limited to replacement of damaged accessories.
DIYers do not have appropriate test equipment, let alone the knowledge to use it or interpret results.
As we all know, with electricity everything can appear OK but you could have no adequate earthing or have reverse polarity. Without the appropriate testing kit, how can you be sure?
In all the years I have worked in this trade I have yet to see a DIY job without defects, one day I will post some photos to back this up.
