I'm always amazed when people suggest that Christ promises health, wealth, and/or comfort on earth. It's not Scriptural.
The Bible clearly tells us we're in "transition." Complete wholeness is a future promise (Hebrews 2:5-9; 1 Corinthians 15:20-28).
If God promised earthly health and happiness, Timothy wouldn't have suffered from stomach problems (1 Timothy 5:23) and Paul would never have been hungry or in need (Philippians 4:12-13). If God promised earthly wholeness, it would be the norm among devoted Christians today. But it's not.
God can and does heal and deliver people, and their stories inspire us. But we also need the testimony of those who maintain a strong faith while living with poor health, persecutions and difficulties.
If God rescued us from every earthly difficulty, we'd never know the depth of His comfort. And we'd never be able to adequately comfort others (2 Corinthians 1:3-7).