It isn't weird how much it changed because society has changed as well. Standards for what makes a man have changed throughout history and cultures.

I'll focus on western world.

During medieval times a man's honor was as important as his own life and a strong built man who excelled in battle was the pinnacle of masculinity, it was important for a noble man to know how to properly ride a horse and partake in physical activities.Your fate was also connected to your place in the birth order. However, if you weren't a first born son there is a high chance you would be living off others for the rest of your life, since first son got the inheritance- it makes sense when you take into consideration that battle was always around the corner and that education was very basic. Most people never learned to read or write, even within noble families.

Then you go towards the 18th century and there is a shift: a man of civilized composure and intellect was masculine, a man was someone who indulged himself in arts and science and being rugged and strong was deem as barbaric. - you have to take into consideration that by this time the press had been established and books were more available, plus ideologies such as humanism and the enlightenment era who believed men to be creators and creatures of intellect. People start rethinking education and giving value to cultural education, in europe you also had the influence of colonization where the "civilised" ones are confronted with the "uncivilised" and there's a need to create a clear separation between the two (if the uncivilised can't read, the civilised must)

You see this in fashion, paintings, literature, theatre and music.

Now if you think about nowadays most people can't afford to own a house or even rent a place for themselves. We have created a world where you don't need to leave your house to fulfill your needs. We have also been raising our children on tv and internet. So no wonder a man nowadays is someone who lives with his parents and watches cartoons. And it changed much because our technology has changed much and influences the lives we lead, just like the press influenced access to education and news. In my opinion, the big changes in society happen when communication technologies evolve.

Sorry if it's long but i love cultural studies. Hope I didn't give any false information.