If Azoospermic men are at higher risk of developing a range of cancers due to infertility then are people who have testicles removed at same risk?

Incorrect assumption. Your primary assumption seems to be incorrect. For good health - Have a diet rich in fresh vegetables, fruits, whole grains, low fat milk and milk products, nuts, beans, legumes, lentils and small amounts of lean meats. Avoid saturated fats. Exercise at least 150 minutes/week and increase the intensity of exercise gradually. Do not use tobacco, alcohol, weed or street drugs in any form. Practice safe sex.