Not sure I get the raya from Yaakov’s lack of response that he held that age order is correct. Yaakov himself planned, at that very wedding, to skip an older sister to marry a younger.
Why would an ehrliche person reject Chazal who say Hanosei ishe tzarich sheyivdok b’acheha, mipneh sherov banim domim l’achei ha’em. Proceed how you wish, and take whatever reports you hear under whatever level of advisement you wish. But you will me mal’ig a significant chazal due to lack of empirical evidence?