If Minato and Kushina were alive or not, like Mito, Kushina would have gotten older, and a new host would have been needed. Naruto being the only person with the same bloodline as Kushina to host TB in the Leaf would have been the prime candidate.
But being raised by a genius Hokage, and Mother with genes as strong as Senju, that knows ancient Uzumaki sealing techs, Naruto would have been a privileged child, and may have not been able to overcome Kurama's hatred. It was the pain of being isolated & mistreatment that gave Naruto strength and resolve to endure and defeat it.
But being raised by a genius Hokage, and Mother with genes as strong as Senju, that knows ancient Uzumaki sealing techs, Naruto would have been a privileged child, and may have not been able to overcome Kurama's hatred. It was the pain of being isolated & mistreatment that gave Naruto strength and resolve to endure and defeat it.