SQL Server SELECT INTO and Blocking With Temp Tables

Question

So, recently a DBA is trying to tell us that we cannot use the syntax of

SELECT X, Y, Z
INTO #MyTable
FROM YourTable

To create temporary ta

Answer 1

I would say lack of locking proof means no locking, which is your proof. Why would the method that the temp table is created in (CREATE or SELECT ... INTO) make a difference in locking TempDB?