It does not matter which component has the pins and which has the slots.
The idea is that they fit together snugly and my thought is that "snug" does not include simply dropping into place.
However, AMD does seem to have "drop in".
https://www.amd.com/en/support/kb/faq/cpu-100
Keyword being "should".
And, if there is a pin out of alignment or slightly bent that would indeed require some additional force to get it all seated together. And if seriously bent or out of alignment then the install would fail with likely damage.
Manually straightening could salvage things but one result would be that a bit of a helpful nudge would be needed to seat it all.
Many electronic devices are assembled by robots that can precisely line up components and use just the right amount of force to seat things into place.
Much harder for us people types to do or do consistently perhaps.
Zero Insertion Force
https://en.wikipedia.org/wiki/Zero_insertion_force
All in all most likely a function of the physical measurements of pins and slots. Especially tolerances with respect to width, length, diameter, etc.
A pin pushing the max diameter would likely have some "drop in" problem with a slot pushing the minimum diameter.
With the numbers of pins growing it may all become even more problematic.....
Now yielding to the engineers.