Have you uncovered some stats for your tubeless is more dangerous theory?.... I would want proper statistical evidence before I would proclaim either way.
hang on which theory is that? I have pointed out that there have been a variety of known issues with tubeless and more 'unexplained incidents' than I'd like to see. 'Unexplained incidents' are exactly that. Unexplained.
Until someone digs in and does some tests which represent the true range of possible conditions of use, I think such incidents will remain unexplained. Some at least will be down to errors in installation. But when (for example) folk who ought to know how to ride a bike and pump a tyre up have a problem with the manufacturer's test bike (for example) and there is no adequate explanation, this does concern me. Probably there is an explanation, but we just don't know what it is yet, and until we do some folk will have problems.
It is a self-selecting set of responses of course but IIRC there are 130-odd responses to the Jan Heine blog posting and there are several reports of similar unexplained problems. Or problems that were mysteriously fixed by using slightly thinner rim tape, (which hardly inspires confidence in the way the tyre is retained, if this makes a difference).
I do have a theory which relates to the retention of tyres (esp on hook beaded rims) varying with the exact location of the seal, because that affects how the bead is pushed into the rim hook. But to assume that this automatically means 'I think tubeless is more dangerous' is putting words into my mouth. As I have mentioned upthread tubeless tyres are normally more likely to stay on the rim in the event of sudden deflation, and this (in that event) is better.
Better understanding of what might cause the other thing to happen would be of use to everyone and sensible discussion is a route towards it. It doesn't always need to be complicated, comparatively simple observations are often enough to improve your safety; for example I would certainly have rejected the badly fitting tyre that my chum prevailed with, because being slack enough not to hold its seat properly would also decrease the chances of the tyre staying on the rim in service.
cheers