?Tether has been PROVEN to pump Bitcoin prices! Why is this wrong?

A study done JOHN M. GRIFFIN AMIN SHAMS on 15th June 2020 proves the following:

​

By mapping the blockchains of Bitcoin and Tether, we are able to establish that one large player on Bitfinex uses Tether to purchase large amounts of Bitcoin when prices are falling and following the printing of Tether. Such price supporting activities are successful as Bitcoin prices rise following the periods of intervention. Indeed, even 1% of the times with extreme exchange of Tether for Bitcoin have substantial aggregate price effects. The buying of Bitcoin with Tether also occurs more aggressively right below salient round‐number price thresholds where the price support might be most effective. Negative EOM price pressure on Bitcoin in months with large Tether issuance points to a month‐end need for dollar reserves for Tether, consistent with partial reserve backing. Our results are most consistent with the supply‐driven hypothesis.

Link to study: https://onlinelibrary.wiley.com/doi/full/10.1111/jofi.12903

https://www.youtube.com/watch?v=6i7JsM0xXBI

It seems the claims people have made against Tether being correlated with Bitcoin rises are incorrect as this study proves that Tether indeed does "Tether printing" action that supports Bitcoin and is followed by Bitcoin price increasing.

What are reasons you think the conclusions of this study are incorrect and false?