This is clearly a lack of understanding of the quality of the calculations. If you want to make predictions, and not merely reproduce known results, you need to be able to judge the quality of your results. This is by far the most difficult task in computational chemistry. I hope the present book will give some idea of the limitations of different methods. Computers don't solve problems, people do.
Computers just generate numbers.
Furthermore, with the constant increase in computational power, a calculation which barely can be done today, will be possible on medium sized machines in 5-10 years. Such insights and rationalizations are much more likely to be useful over a longer period of time, than the raw results themselves. This may not be particular accurate from a quantum mechanical point of view, but it is very effective in rationalizing a large body of experimental results, and has good predictive power. Just as computers do not solve problems, mathematics by itself do not provide insight. It merely provides formulas, a framework for organizing thoughts.