It may be a surprise to some, but not to me, that they are neither healthier for the eater or for the environment.
I’d like to eat actual lab-grown meat, but it has to be cost effective, and nutritionally equivalent to the stuff on the hoof (or claw).
[Update a couple minutes later]
In reading, as is often the case, part of the health claim derives from the false notion that eating “red meat,” and particularly saturated fat, is unhealthy. There is zero scientific evidence for either. So they’re basically proposing to replace something humans have been eating since the dawn of humanity with some lab-produced glop about which we are completely ignorant of its nutritional effects.