You just have to avoid the "to fast too soon" problem, but that is another discussion.
On the contrary, I think that IS this discussion.
---------- Post added July 19th, 2015 at 04:05 PM ----------
You seemed to have indicated that there was a meaningful difference between 20 and 200. If there's no "magic" number... how do you know that 20 isn't enough? I'm not saying that it IS enough... but I have no way of stating unequivocally that it isn't.
I think that one unacknowledged source of disputes here is that there are two different interpretations of "magic number", and they are not equivalent:
1. If you have at least N dives, you are qualified to start technical diving.
2. If you do not have at least N dives, you are not qualified to start technical diving.
Some people are interpreting magic number in terms of #1, and I think that's a lost cause. I think we can agree that there are divers who, no matter how many dives they'e done, shouldn't get into technical diving.
In contrast, there is a case to be made in terms of #2, and personally, I think the agencies are setting the bar way too low, but maybe I'm wrong, which is why I solicited opinions.
Note that my original question wasn't "where should the agencies set the bar", but rather "where would you, as someone (presumably) with experience in technical diving, perhaps even as a trainer in technical diving, set the bar"?