As a patient with significant existing breast tissue and breast ptosis (droop), a breast implant will simply give you a slightly bigger version of what you have. This is because your breast implant is placed underneath the breast tissue you already have. As you can imagine, your natural breasts will be on top of whatever implant is inserted, so the change in size and shape will be very limited. The actual aesthetics of your breasts will only change very slightly if you have just an implant without a lift. If you are wanting to address any aspects relating to shape, symmetry, cleavage, or upper pole, you will not be able to achieve this without a breast lift as your natural breast tissue will always sit on top of your implants. It is likely that any surgeon who has consulted with you is declining to perform a standalone breast augmentation as they do not believe the aesthetic changes are worth the risks involved with invasive surgery.