Convert point markers to duration markers in batch

Social media demands engaging content capable of “hooking” the viewer in an infinitesimally short amount of time. One way to achieve this is through a rapid succession of frames.

When editing short form content, I review a longer clip at high speed and place point markers at each segment I want to include in the final edit. Currently, I go back to each marker, and select an in and out range to then drop into a rough sequence of rapid edits.
 

It would drastically improve my workflow if I was able to convert each of those point markers in mass into duration markers, of a chosen length, and then drop them all as clips into a sequence.

So the proposed workflow would look something like this:

-set point markers

-convert all point markers to range markers, length 3s, proceeding the marker, preceding the marker, or centered at the marker.
-create new sequence with all range markers, or drop all range markers as clips into new sequence