Nope, not a good idea. You need to properly apply a thin coating of
the correct flux over the pins after making sure the area is clean.
You also need a proper temperature controlled soldering station for the
type of solder that is going to be used. I typically use a silver
based solder for this type of rework as it flows smoother with less
beading up.

The more common problem on laptop boards is the via will become
dislodged and there is no real way to fix it without very expensive
equipment. These are multi-layer up to 16 circuit boards and you have
no access to the internal layers.

It does not hurt to do a good full visual inspection of the components
you do have access under a well lit 40X magnifier while moving the
board. With experience you learn what to look for on the board.