As you don’t understand the difference there is no sense in further arguing. Your human body story just shows this more.
Other people may understand.
If total visits shown in your second screenshot is accurate the percentages may be comparable, but we don’t know how accurate that is in comparison to Alexa so I will stay with the data of only one site (Alexa) for now.
6.2% of visits of a rank 1000 Alexa site can be 50% of visits of a rank 1800 site.
We know for sure:
videohive is sending over 6.2% of his traffic to envato: could be anything between 6.2 and 100.
videohive is getting exactly 4.8% of its visits from envato.
The rest is water in human bodies and taxpayer fairytales and so on.