No, that is exactly what you are doing.
All the available evidence shows boys, especially, do less well across the board when raised without a father in the home.
Years ago I coached at an inner city school, lots of single moms, I've seen the results first hand. I'd like to think for many of those kids I was a positive male role model, maybe one of the only ones in their life. Unfortunately I don't live in that area anymore.
Of course they're less motivated, it's quite literally a rigged game.
Also, just in defence of female teachers, I don't think it matters so much that they're women, but that they understand that boys will be boys. Anti-male teachers were, at least in the experience of myself and a friend who went to a different school (we discussed this once), definitely present but firmly in the minority.
They know they should do it between certain ages which means they need a career which means they need an education e.t.c.
There's nothing equivalent for men, no event they can see coming within a decade or two that helps anchor them in their lives.
So anecdotally, the theory that (in general) boys need more nudging than girls from someone in their life in order to be successful rings true. But what would account for a modern change? Are there fewer people pushing, now? Are boys more resistant to it now, or maybe more distracted? Are expectations of boys different now than they were in the past?
Or perhaps parents are more distracted. Much has been made of how our digital age has made us, as individuals, more distracted and less connected to individuals in our life. For a parent, it doesn't seem unlikely that that would translate to being less invested in their child, or at least not as proactive in this kind of nudging.
Do you see that as innate or as a symptom of society's biases?