No it doesn't. Your point was Forbidden Valley was aimed at riders 1.4 metres tall and above, which it demonstratably isn't currently or even historically. The Blade is the only operational flat ride in the area, so of course it counts. The most recent flat ride installed in Forbidden Valley, Funk 'n' Fly, had a height restriction of 1.2 metres.
Once again, every area of Alton Towers, at its peak, had rides which catered for a mixture of height requirements. This also happened to be when the park worked at its best.