Sample size is relevant to which opinions to form. But I think the GP wanted to point out that just having a small sample size does not invalidate the results o

Sample size is relevant to which opinions to form. But I think the GP wanted to point out that just having a small sample size does not invalidate the results of a study given equal confidence scores. It's a common misconception that the conclusions of a large study always are more trustworthy than from a small study. A larger study will however be able to detect smaller effects and will, as you mention, provide more precision.