the link was to a meta study that concludes that artificial sweeteners have no evidence that they cause harm.
This is how the meta study concludes:
Results from prospective cohort studies suggest the possibility of long-term harm in the form of increased risk of obesity, type 2 diabetes, cardiovascular diseases and mortality. Further research is needed to determine whether the observed associations are genuine or a result of reverse causation and/or residual confounding. Further research is also needed in children and pregnant women, the latter for which prospective cohort studies currently suggest possible unfavourable effects of NSS consumption on birthweight and adiposity in offspring later in life.
The scientists who produced the study seem a lot less convinced than you.