A snapshot of information is unlikely to be all the information.
It might just be anecdotical evidence.
A glimpse or a glance is not enough.
An opinion is just that.
You will need to calibrate and validate.
You may have encountered an odd batch.
A bad day.
Something out of the norm.
You could be misguided.
Misdirected.
Mistaken.
You might take something as given when it is not.
Be careful the sample of one.
“He that speaks much, is much mistaken.” – Benjamin Franklin
“Mind is a machine for jumping to conclusions.” – Daniel Kahneman, author of Thinking, Fast and Slow