Carry weight is a secondary statistic determined by a character's attributes through the SPECIAL system’s primary statistics. As annoying as it can sometimes be, that’s part of why it’s there, to keep the game challenging and make you prioritize what you need for any given time, especially when on survival difficulty.
Like other FPS era Fallout games, your movement speed is unaffected by your carry weight until you are over-encumbered, thus preventing you from running, sprinting or fast traveling. But fortunately, there are plenty of ways to increase what you can carry with you. Your player character starts with a base carry capacity of 200, with an additional 10 added for every level up point you put into the strength slot. Fallout 4 is no exception, with our inventory being limited by our carry weight capacity. Everyone who has played an open-world RPG knows the struggle of having to limit the amount of loot and supplies you can carry on your person.