I don’t use PHD2 drift alignment so can’t comment on that procedure
Don’t get confused between Polar Alignment ( Drift or other methods ) and Star Alignment , they are 2 different things
Polar alignment adjusts your mount in Altitude and Azimuth to align or centralise your mounts axis with the polar axis
Star alignment is used so your mount has a pointing model of the night sky ( via 1, 2 , 3 or more alignment stars ) and can Goto selected targets by use of a hand controller, or planetarium software
In some Polar alignment routines , Star alignments are used to plate solve or map the polar alignment Star ( eg Synscan Polar Alignment routine using hand controller. This is what I use )
Hope the above makes sense
Maybe some others can comment and explain further
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