Why do Turbo Tax not allow joint returns to have medical expenses on both returns?

Seniors in nursing homes often have annual medical in excess of $75,000.00 and it would be great if Turbo Tax would allow on coupled accounts the same as Studio Tax. This would be a great new feature for 2019 tax returns Taxpayers are not concerned about the additional 3% of net income as a additional deduction from the total medical expense. You should be allowed to enter medical expense on both  returns that are coupled.