Intraday trading can and will bring income, but only in the case of unconditional compliance with trade discipline, the competent drawing up of an action plan and the removal of all emotions.
So you got to have some skills exactly
Day trading or Week trading can bring some income but they could bring back the loss also with it . Nobody can tell exactly what will happen next but the only thing that we can make sure is only the discipline people will be more success than others like you mention.