Naruto had to train to be able to control the beasts, he had to endure hard ship to be accepted. If naruto never had the beast in side of him he would be pretty strong because he would stil lget trained by minato/jiraiya (it would continue because they wouldnt have died). The kages would train him, because he's related to minato. Different strong people will train with him. His chakra control wouldnt be ****ed up because of kurama. But eventually with hard work he learned to accept his fate, he channeled the being's chakra within him,and utilized it to his own.
I get annoyed when people say the beast arent naruto's chakra, yes we knwo they're other beings. But naruto worked hard to have control over them, the beasts didnt just give hi mthe chakra, naruto helped them and trained physically and mentally for them to accept him, madara took the beasts and still doesn't have full control over thme because he doesn't understand them. If the beasts werent in good terms with naruto, he would be just like madara/obito.
Dont forget, only naruto can use the beast like he does, nobody else knows how. Thats like saying, even though a pokemon trainer worked hard and cought legendaries and the legendaries grew to loving him, they're not his own.
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thats like saying because you bought a pet and they grew to liking you and does things for you the pet aint yours.
