Memes are not studies. If you can't at least find one to support the point I'd hazard it was never true. You can't base an argument around a single video, or even a collection of them. Data is generally needed.
White knighting is pretty exclusively used in a derogatory manner, which would indicate that most people think it's not the default and that it's cringe.
Men doing stupid things for women is not the fault of women. It also does not translate to defending women.
If men were so ready to defend women, why was the me too movement needed? Why is there still sexism in the workplace, or at all? Do I believe that some men like to appear masculine? Yes. Do I believe that some men equate masculinity with violence? Yes. Do I think that necessarily equates to protecting women, or doing things that benefit women? Absolutely not.
You say you didn't read enough to follow, and that you don't have any studies, but that there is definitely a point to be made. Even if there is, your comment does not really support that.
This feels like how Trump got elected. Commenting about how memes proved a point and just going off of vibes, it must be right.