No, no at all. The thing is that mortality is a popular way to make a character weaker but in case of Absolute Immortality, you can make it even more interesting with this if your character is live and creative. For instance, you could compose a story about journey this character throughout times and express how they change. With AI, it's likely this person gains a lot of knowledge, extreme skills and hyper experience. You can make a character that would be ex extension of human if it was eternal and indestructible since it has a whole eternity ahead. I hope that helps you.

Nah bc peeps like lobo, deadpool, doomsday, wolverine etc. are some of my favorite characters, & instead of them plowing through planets or holding up 3x earth's size they are just really resistant. (ik lobo & doomsday however do have some ridiculous strength feats)