almost, but rent-seeking is an odd form of capitalism, because in its pure form it isn't providing value.
nothing in the real world is in its pure form, and some business are able to provide value which they cannot charge for because they can rent-seek on other areas, so there is always nuance.
but an economy where rent-seeking is the main path to wealth is an economy in really poor shape.
Rent seeking is the end result of capitalism as an economic system. The goal of a capitalist is to accumulate capital (wealth), and rent seeking allows you to do this without expending any effort. Any capitalist acting rationally within the system of capitalism will desire to seek rent.