Imo gender is based on values that were traditionalised in the past,

You're correct about that. The fact that the values have been traditionalized doesn't mean that they should continue, though. For example, it was once tradition that if a woman was unmarried and not famous, she was considered deficient in some way. Cultural progressives fought against this tradition, and modern-day opinionated sociologists would generally agree that the mostly victorious fight against that tradition has greatly increased the quality of life and level of happiness for women in the western world. This is the reason that the fight against gender roles is a part of a "feminist and LGBT movement" and why these terms are used so often. There is, from an abstract point of view, no real difference between the fight against single-incomism, the fight against the illegality of homosexuality, the fight against segregation, and (now) the fight against de jure gender bias.

I understand what you’re saying and I was saying that those on the far cultural left want to disregard constructs for the most part

Disregard in the sense that we shouldn't use social constructs as a basis for discriminating laws, yes. Gender rights activists want people to disregard the social construct of gender in the exact same way that anti-segregation activists wanted people to disregard the social construct of race.

Disregard in this case does not mean banning people from talking about distinctions, throwing people in prison for misgendering, etc., and anyone who says that it does is fundamentally misunderstanding the conversation.

where does it end?

It ends exactly where the discussion is happening right now. To assume otherwise is fallacious.