Damn serious thought after reading various posts on this and other subs, and my life experiences

Hello and warm namaste to all women of this sub. There is this deep and serious question which has been bugging me subconsciously and now have come to a form. I would try to articulate it as clearly and respectfully as possible, so please don’t judge me.

With all the cases of cheating coming up or increasing. Specially with the cases where female partner or gf cheats, do you think that there is ALWAYS, and I mean ALWAYS, the fault of the guy? Like either he didn’t treat her well, or paid enough attention or ignored the signs. Or is it only sometimes that way and I should not consider healthy relationships to be perfect and women have their moments of weakness and there are some guys out there with whom cheating won’t be actually cheating in their mind?

Apologies if you feel something is not well articulated, open to suggestions.

TLDR: Are men themselves at fault mostly if not in all cases where their partner cheats on them?