Student or Learner
"Some people may still maintain that in our material world, everything
depends on time. It is even “lacking time” that causes much of the stress
that leads to the illnesses we mentioned. How would it be possible to find
time to do Reiki to ourselves and the people around us when we cannot
even find time to go to the theater? This is one good thing about Reiki; it
does not require more than 15 minutes of our time. There is no need for
changing clothes or special equipment. It is a wonderfully simple healing
art, an effective method of relaxation and stress-relief. Most important of
all, it is less time consuming than medicine if we think of all the time we
spend taking medicine for some complaints and taking some more for the
side effects as well.
Having said these, resistance to Reiki would be quite illogical. Reiki is
natural and drug-free. What is more, it is easy to learn by anyone,
regardless of age and experience. It can be used anywhere, anytime. It
also enhances physical, mental, emotional and spiritual well-being and the
benefits last a lifetime. It is definitely high time to get away from thedrug
boxes we store in our drug cabinet"
Is "having said these" from the quoted paragraph above have nothing to do with "having said that" in terms of their meaning, which means "but". Is the essential meaning of "having said these" is "taking the things said before into account "?
(Not a Teacher)
The phrases, "Having said that/this" and "That being said" typically introduce a turn in the conversation, much like "but" and "however". In this case though, the author probably meant, as you have stated, "with all these things taken into account".
Personally, I would have used something like "therefore" or "as you can see".