I think the ever-present difficulty here is that understandably, when people see 'formula feeding has negative health effects/formula feeding harms health' they equate it to 'you have damaged your children by formula feeding'.
The two things are not the same.
It is often impossible to see or assess the health impact of something in individual people, anyway. The fact that child A was formula fed and is healthy at X years of age means zero. It neither 'proves' nor 'disproves' anything at all.
I have given up with this argument! It's crystal clear to me that breastfeeding, as the physiological norm, does not have 'benefits' any more than breathing has 'benefits' over being hooked up to an oxygen tank - one is what our bodies 'expect' to happen, and the other is what is used when that expectation does not materialise.
But someone will now say 'tiktok said formula feeding is the same as being hooked up to an oxygen tank - how disgraceful and how terrible...'
:(
I blame our education system in some ways. We are rarely told how research works, how to interpret it, and much about statistics.