That is a lot of holes.

I would fill the holes by getting plugs made out of similar or harder lumber, cleaning up the holes if need be so they are dimensionally tight to the plugs - no more than 1/16” slop. Then mix up some West System 105 epoxy, wet the interior of the holes for good soak-in, then add in 403, 404 or 405 adhesive fillers to thicken it up, heavily coat the hole and plugs with that, and pushing them in until it oozes out everywhere :)

Then use the same process to glue in some blocks to fill in front area of the studs.

That will be as strong as the original stud, if not stronger. Dimensional lumber (typ. white pine or redwood) isn't that strong :)

I agree it's not a concern, but that is a lot of holes.

For comfort's sake I would fill the holes by getting plugs made out of similar or harder lumber, cleaning up the holes if need be so they are dimensionally tight to the plugs - no more than 1/16” slop. Then mix up some West System 105 epoxy, wet the interior of the holes for good soak-in, then add in 403, 404 or 405 adhesive fillers to thicken it up, heavily coat the hole and plugs with that, and pushing them in until it oozes out everywhere :)

Then use the same process to glue in some blocks to fill in front area of the studs.

That will be as strong as the original stud, if not stronger. Dimensional lumber (typ. white pine or redwood) isn't that strong :)