True, you won't notice any problem right away, especially since the squeeling goes away.
But, if you've dealt with Weinmann calipers over time, and had to later tighten the bolts (only to cause binding), then you might hesitate to fix the squeeling the easy way, especially as today's better pads have not only the orbital adjustment but can be found with heavily offset pads which directly counteract the same twisting forces on the bridge and posts which contribute heavily to squeeling.

The Park tool could thus be said to be useful for toeing caliper brakes other than Dia-Compe/Weinmann centerpulls, which are unique in having the pivot sleeves not part of the caliper bridge, but rather stabilized on their narrow ends by bolt forces alone.