Why should a click wrench not be used after tightening an ESTIC DC nutrunner?

As we know, DC nutrunners are very accurate, such as theEstic DC nutrunner, which has ±3% accuracy and can adjust itself based on joint type. We use these high-cost DC nutrunners to improve our process and to get high-quality "process". Estic DC nutrunners gives a complete pokayoke process, which means a complete error-proof process . When we use impact tools or pulse tools in our process, we use click wrenches to assure that tightening is happening accurately or not . But after tightening with Estic DC nutrunner, we do not need to use a click wrench to assure that tightening is happening accurately or not, because Estic DC nutrunner contains a highly precise "Strain Guage Transducer" which gives high accuracy during tightening. It can adjust itself in changed conditions also.

We can totally trust the Estic DC nutrunner tightening , and if we use click type torque wrench after tighten by Estic then there is a chance that torque will go above from Max limit if Max limit is very close to target . It is true that click wrench clicks when it achieves desire torque but this is also true that we cannot stop our hand during rotating the click wrench and somewhere we put extra efforts and torque goes above from target torque but we think that this tightening is Ok but we do not know that we have made it extra from target because we cannot stop our hand accurately while moving it . This is a human error in operating process of Click wrench . So never use click wrench after tightening happen with a Estic DC nutrunner . We can use click wrench when tightening is happening with a impact tool because impact tool accuracy is ±30-40% so their max value also should be broad.