Forehead reconstruction , as known as "type 3" is an advanced craniofacial surgery technique. Some maxilliofacial surgeons also get special training to learn and safely perform this technique. Cosmetic, plastic surgeons are familiar with this procedure, but are not trained for it. It takes a lot of learning from someone who is doing it for a very long time, in order to do it safely, which includes avoiding complications. Very small number of surgeons in a whole world are trained to do this procedure. Other than resolving post-trauma facial reconstruction, sinus complications, and facial feminization surgery, there aren't that many requests and need for this procedure.
Complications depend on if it is done correctly and safely. I only know numbers for one FFS surgeon... 3 patients had sinus complications out of 700+ patients who had this procedure with him. All three many years after surgery. That being said, even people who never had any kind of sinus involving surgery or anykind of surgery, get sinus complications.
Problems with other not-reconstruction technique are: In most cases, it is not possible to achieve a lot of change to brow bossing. Which leaves two problems, bossing is still there, mostly unchanged, and because of that, it is not possible to efficiently remodel and feminize supraorbital ridge.. how much can a surgeon change orbital rims, is dependent on overall forehead shape. In a case where forehead was not feminized enough, there is only so much a surgeon can do with orbital rims, without making everything look really strange. Orbital area, is the key where achieving feminization happens, because a result of feminizing upper and lateral orbital ridge is change in expression of the eyes, and shift in overall facial expression from masculine to feminine. Plastic and cosmetic surgeons, do the best they can in achieving a feminization effect, and because they in most cases can't efficiently feminize forehead and orbital area, the compensate not achieving "natural" change in eyes expression, with lifting the eyebrows way too high. Which result in a feminizing effect, and happy customer, but also results in unnatural position of eyebrows and unnatural look (natural position of eyebrows is defined by supraorbital ridge).
Another thing is bone strength... bone is usually strongest at the surface area, and underneath that in a much more fragile bone structure. While removing that little bone which can be removed with shaving technique, the strongest part of bone gets shaved away, and from 2.5mm bone thickness, you get left with 1mm thick fragile bone wall. Is it even worth doing anything like this for shaving off 1.5mm of bone, while being left with almost the same amount of brow bossing (although it looks more polished and smooth)? I almost didn't have any brow bossing, just a tiny little on one side. Regardless of that, my forehead shape couldn't be feminized to my liking with this technique, and I really didn't want the risk any accident in the future... like playing with ball with children, and receiving a hit in my forehead, which would result in colapsed forehead wall. Or bumping into open doors of upper cabinet... imagine it yourself. I prefer not to.
If forehead reconstruction is done correctly, when healed, there shouldn't be any risk to forehead wall strength.. With shaving technique this is a very serious risk.
All FFS surgeons who are able to perform "type3" reconstruction technique, are almost exclusively only using this technique. Only in case of minimal sinus and extremly thick sinus frontal bone wall (3% of patients) would they be able to achieve the same result as with reconstruction. And Facial team said, they would still prefer to remove sinus wall and do a proper reconstruction.
Why dr. Zukowski says what he says on his website is pretty clear. I'm not stupid, I would write exactly the same thing if I was in his position. And like him I wouldn't post side-profile photos of most patients either... Look at the website of dr. Mayer to see what I mean.
Doing the research and observation yourself is the key! In the end it is you making a choice. Reading the forums can help with some information, mostly regarding patients experience... But take everything with a grain of salt.