Yes, you can get used to no salt in food, but your food is not going to taste anywhere near as good.
Salt doesn't just bring out the flavours in individual ingredients, it also interacts with other compounds to change texture and other things which affect the end result of the dish. Nearly all home cooks underseason their food and it's probably the biggest difference between home cooking and restaurant cooking.
One example is pea soup - underseasoned pea soup is nowhere near as sweet and fresh tasting as a correctly seasoned one. Another is pasta - pasta cooked in unsalted or under-salted water will not have as nice a texture as that which has been cooked in a 10g/1litre solution.
As for the "health" aspect, yes, you will have a benefit for reducing blood pressure if you have particular problems, but I don't think home cooked food is the issue here for people.