My tyre fitter says these type of rims are OK but others go by the book. For what it is worth I run 2 Fulvias and a Beta HPE tubeless. I would have run a third without but the Michelin tyre was specifically for tubed as Michelin left out the inner layer of sealant in the manufacture process of XZX classic range so without a tube the air would leach out through the tyre carcass. My 1600HF has done 10000 miles on its current tyres and similar on my Sport1600. Its everyone's own decision.....
I hear what you say and would prefer to run tubeless too.
I think the problem that can arise is that if the air pressure is too low, as with a slowish puncture you might not have noticed, the tyre can come away from the rim on a corner/bend with potentially serious consequences. With a proper tubeless rim it usually stays on the rim and gives a chance of better control.
I reckon to have one puncture in about 60,000 miles of everyday motoring. With the Fulvia I'll be long gone before I get one statistically! As you say, best for people to make their own choice if they know the potential issues.
