Would you tell a woman that her large breasts wouldn't cause back issues and not to get a breast reduction?
Why would you think the same things don't impact your knees and joints? Nobody is less than for being overweight, but talk to anyone who once was overweight / obese (im one) and they will tell you that going up stairs without being in pain / winded is definitely a signal of healthier living.
So large breasts never cause back problems?