If you don't have the time to obtain the expertise one can still do good checks (only not in the details). For example if we are willing to accept the correctne

If you don't have the time to obtain the expertise one can still do good checks (only not in the details). For example if we are willing to accept the correctness (in some formalized sense) of a statistical test, we can still check whether it was applied correctly (or alternatively you can accept that it was applied correctly and try to understand the proof details behind the statistical methods). This way you will surely not get a complete understanding, but neverthess can check parts of the chain of conclusions and falsification attempts.