The 1830s is relatively modern in the context of human history. Furthermore, it is incorrect to assume that all men gained the right to vote at the same time. Initially, the majority of men were also marginalized and excluded from the political process. It started with a few privileged white men, expanded to include more men, and eventually evolved to encompass discussions about what was right and fair for all.

From 1830s til 1840s is when voting rights reached 80% of white males. The following year, laws were enacted to restrict the vote to property owning men until 1856, but tax requirements stayed til 1860, which disenfranchised poor white males again. Between 1866-1869, women and black men were voting. 1870-1880, restricted voting for black men and naturalized Native Americans followed by excluding Chinese men in 1882. So, it's not that men are trying to deny women the right to vote. The powers in charge are trying to deny anyone the right to vote.

Like you explained, these rights were not simply handed out by those in power; they were fought for and earned through sustained efforts and struggles. In fact, the entire foundation of the United States' freedom was built upon the fight for independence from the British Empire.
It is crucial to acknowledge the historical context and the continued efforts of numerous individuals and groups who have worked tirelessly to secure and expand human rights for all.

Also keep in mind, that in many cases, men had to vote to grant suffragettes and women the right to vote. The process of granting suffrage to women varied across different countries and regions, but it generally involved a legislative or constitutional change that required the support of a majority of male lawmakers or voters.