It did make it more difficult, but that did not mean that it was completely impossible or strictly forbidden.
There were exceptions to every rule and loopholes to exploit whenever there were limitations set.
Not everything was completely set in stone unless it was an absolute taboo that had been expressed very clearly for everyone to follow without question.
It was not easy to make a good decision when it came to hiring ordinary people for a Balancer family or organisation that could be trustworthy, so most did not do it.
They could try to choose someone among the many people, but there was always a risk of them having absolutely no connection to the supernatural world.
If they posted ads about a job advert, it was still very unlikely that they would be able to hire someone who would be able to keep their secrets while performing such duties.
