I do not know if that is an ignorant statement or just something that is being said to reassure you. You did not provide photographs so lets talk hypothetically. There is always resting tone between the brow elevators (frontalis muscle) and the brow depressors (orbicularis oculi, corrugator supercilli, procerus, and depressor supercilli muscles). In the presence of brow ptosis where the upper eyelid fold rests on the eyelid platform or against the eyelashes, or then there is upper eyelid ptosis, a signal is sent to the brain to activate the frontalis muscle to elevate the forehead and the eyebrows. This generally reduced the bulk resting on the upper eyelid.Performing upper blepharoplasty and or ptosis surgery, reduces the drive to elevate the eyebrows. Inevitably to some degree, the eyebrows will relax to a lower position following these surgeries. The effect of this is not always detrimental. Relaxation of the frontalis muscle is associated with fewer forehead lines and less brow furrowing. However, this must be individually assessed in designing a blepharoplasty for a given individual. Sometimes the degree of relaxation is simply too much and not aesthetically beneficial. The effect of an over aggressive upper blepharoplasty in a setting of a hyper mobile eyebrow can be a fall in the brow so low that it almost looks like the surgeon sewed the eyebrows to the eyelashes. In these circumstances, it is prudent to offer a forehead lift with the upper blepharoplasty to stabilize the eyebrows so they do not collapse into the eyelid space after surgery. Repositioning the brow will necessarily effect the amount of upper eyelid skin resection that is necessary. Ultimately, there is no substitute for a consultation with a very experienced oculofacial surgeon who listens to your goals and concerns, performs a detailed examination, and discusses your options so you are empowered to make the right choice and not force you to settle for cookie cutter surgery.