There are DIY jobs and there are jobs which should not be DIY even though anyone can do anything themselves, albeit badly. ... If it is decided to 'help' someone regardless of their competence and regard for safety that is your decision.
That is accepted, and is the usual 'general discussion' we have. However, the suggestion/implication in this thread seems to have been that someone who cannot understand, measure and interpret, say, R1+R2 and Zs, they do not have 'the skill and knowledge' to undertake
any electrical DIY work. Whilst I can obviously understand why some people say that, and respect their right to have that view, as I have said it is effectively saying that virtually no 'occasional electrical DIY' should ever be done. Is that your view?