1. The percentages you cite aren’t useful on their own, as one also needs to know how often each kind of food is consumed. Only then would we know the relative risk of eating each kind of food.
2. Most food plants are grown outdoors (often near livestock) and many aren’t cooked before eating. Cultured meat is grown in sterile environments and is typically cooked. These differences mean that it will almost certainly have a lower disease risk than any natural food.
> Cultured meat is grown in sterile environments and is typically cooked. These differences mean that it will almost certainly have a lower disease risk than any natural food.
Maybe, or maybe we'll discover in 10 years that eating lab grown meat gives you some form of cancer. Until it is used on a large scale for a number of years (as in decades) we have no idea what the effect of consuming lab grown meat has on ones health.
We can know it's safe without a long track record of use because of biology, chemistry, and physics. Cultured meat is the same muscle cells with the same DNA. If it caused cancer but animal meat didn't, that would tell us something new about biology, chemistry, and/or physics.
Your fear-mongering postulates unknown mechanisms of action that science would almost certainly have discovered by now. That's not just unscientific, it's anti-scientific. It's on the same level as, "What if cell phones cause cancer?" or "What if vaping is worse than smoking?"