They might be, but that‘s not the reason why there are less male teachers. It is not harder to become a teacher, when you are male. They are just less interested in becoming one (on average). As are women to drive container ships. Although I don’t think that there is just one woman, who wants to do it.

it is the reason in new zealand. there it is practically impossible for men to become teachers at least in kindergarten and primary school because parents don't trust them. sad really because kids need rolemodels from both genders

The "solution" to this problem is to not allow people to choose. In the country where I live the vast majority of schools are funded from the very high taxes you pay. You'd still have to pay those taxes if you choose to enroll your kid in a private school just so you could avoid a male teacher.

Male teachers are nevertheless underrepresented, due to other biases.

actually i think it is relevant because the attitude towards gender in different professions is very much the topic of this post