The show's judge spoke out after 10-year-old Hollie Steel's on-air breakdown sparked concern from viewers last night.
Steel was given a second chance to perform in the fifth semi-final after bursting into tears during her original rendition of 'Edelweiss'.
Reflecting on the incident, Morgan told Sky News: "Kids do tend to get nervous about these things. But the idea that this should be the basis for removing all children from Britain's Got Talent is just ridiculous."
The former tabloid editor also responded to remarks made by psychologist David Wilson, who accused show chiefs of exploiting contestants like Susan Boyle.
Morgan insisted: "[The producers] have a whole army of doctors, psychiatrists and experts all available to any contestant at any time. They have all been taking great care of Susan."
The Britain's Got Talent final begins at 6.45pm tonight on ITV1.