I don't give a fuck about the slippery slope argument. Society heavily regulates all kinds of things - explosives, vehicles, chemicals, etc. - to minimize harm. The people who need those potentially dangerous things still have access to them. It shouldn't be a big deal to heavily regulate semi-auto firearms, except many have entangled their identity to them and a political party shamefully decided to take advantage. The US is in an overall very sad and irresponsible place.
I don't have a lot a sympathy for the stance that firearms confer benefit to a household considering they have been shown to increase suicide rates and homicide rates related to domestic violence. However, introducing licensing, registration, training and safety requirements may change that. Plus there isn't a need for semi-auto rifles for home defense (unless an identity formed watching Rambo or irresponsible media consumption allows someone to live in fear). The only need for those type of firearms are in certain limited wildlife management settings (i.e., needs-based permit system).