It will also help you to get a few helpful perks later on.

Don't argue, just up that charisma skill!

You're going to be using stims and chems like crazy if you don't invest heavily in endurance. On hardcore difficulty, and for the best build, you want as much carrying capacity as you can get!

Not only does it affect your melee, but it allows you to carry a lot more weight in your inventory. Strength 10: Your strength is the first-most important skill at your disposal.