Fish that show parental care are often different from egg scatterers, and I think it's the latter that the liquifry instructions refer to. With egg scatterers, the fry won't stand much chance of survival if they go through a 'wriggler' stage. They need to be able to swim off and hide from the second they hatch. For fish like gouramis and some cichlids, the parents care for the newly hatched fry, so they can go through a 'wriggler' stage between hatching and becoming free swimming. I use the word wriggler as that's what this intermediate stage is called with south American cichlids.
The danger of moving the bubble nest without the father is that the fry need to be kept at the surface at this stage; if they fall out of the nest, dad puts them back. If he wasn't there, they wouldn't be able to get back. You could try moving the nest and the father, though he might get so stressed he'd eat the fry.
Hmmm, not sure what to suggest for the best.......