You are making assumptions. It shows that you dont have any idea of leftism.

The idea of leftism is that people (and animals in most cases) are the same and deserve their needs met.

You can criticize the measures taken to ensure this, especially in capitalist societies where you may have to use force to break capitalist resistance. If all you ever knew is rape, being disallowed to rape can feel repressive. But its still okay to repress it.

And it is okay to disagree on this. Thats why we have both anarchists and marxists. Massively simplified, one party wants to mentally arm the population and push for a self educating, politically mature population. The other one wants to change the system from the top and reeducate the public on cooperation and classless society while forcefully repressing the regressive ideas.

They both actually want the same, communism. The classless, stateless society.

Of course that is an ideal, a utopia that might never be real but the millions of people dying under capitalism every year and the exploited people all over the world, the exploited planet that is starting to kick us out are WAY worse than all that has been seen before. The strongest argument for marxism is the limited time we have before we will just die out (starting with those who already are exploited the most today).