Earlier quoted context omitted.
I'm confused, in what way has the government deincentivized/roadblocked marriage?
https://www.investopedia.com/terms/m/marriage-penalty.asp
Second, you are nuts if you think this has ANY significant impact on people getting married.
Third, you can file married filed separately.. so while I'm not up on all the details of that, you can probably avoid the simple impacts it might have.
Anyway, that is an extremely crazy weak argument.