While I do not have the scientific research into their current mortality rate I do have the fact that the floor in those brooders is not insulated. You can say this is "just based on emotions" but you are not providing me with any science showing that the brooders are in fact working.
It is the job of the OP to "prove" the subject. You said it yourself, you do not have proof. Until you have proof, there is no need for anyone else to provide you with anything other than opinion either supporting or opposing your opinion. None of that changes that point that the statement I referenced is provable.
Someone gathers empirical evidence about a touchy feely subject and augments it with potentially misleading video (that really only shows normal chick behavior) banking on the chance that the touchy feely video will evoke strong reaction. This is a tried & true method for activists without much in the way of fact and or experience in the subject they are upset about.
Your response is also an opinion. There simply is no evidence that an insulated floor makes chicks more "comfortable" or that it improves their survivability. Chicks huddle and disperse for a multitude of reasons and the video clip is a snapshot in time. We certainly do not know what the chicks were doing immediately prior to or after this, artfully edited, video. It is possible that the conditions changed or that the reason for the chick behavior was caused by an unknown condition. For this video to be compelling, many factors must be accepted as true without supporting evidence. That is the epitome of an emotional response.
As far I I know the OP may be in direct competition with the corporate farm store and this may be a way to steer business to their own ventures. There simply is a lack of evidence to support any action outside of personal patronage.
I am not a fan of cancel culture. It's not my job to tell
TSC how to brood their chicks. I certainly would not listen to
TSC if they told me I needed to change my practices simply because they found them to be not to their liking. If I were to go to any seller and I found their practices unacceptable, I simply would go elsewhere regardless what others may tell me is the best course of action.