When IT does get the blame, justified or not, it often falls on the use of new, untested or poorly understood IT components.
Blame relies on hindsight.
Despite IT having some grey hairs, many business executives still feel unable to ask the right questions of their IT managers at the start of a programme. The firm is unlikely to have the support systems and processes that the project is likely to require. Building these at the same time as doing the project will add significantly to both the cost and the risk. Using relatively new technology is riskier than using old technology. You should only ever consider this approach if the technology proposed is vital to the delivery of business benefit and this benefit can not be achieved in any other manner.