Death is inherently permanent and life is inherently temporary. Any life problem is still ultimately temporary.

And just because a medical condition isn’t “curable” doesn’t mean it isn’t “treatable”, and treatments continue to be developed.

And, with many medical condition, environmental factors can significantly change quality of life.

One can’t definitely know what their personal experience of an incurable medical condition will be in the future.

Edit: what I just said but in meme form: