Getting that advice from one surgeon isn't much to worry about, although it would be worth relaying that information to the other surgeons you've seen and find out what their specific counterargument to that is.
If you were to get this same response from multiple doctors, then you'd have something to really consider.
The problem with the comb, is most people don't know how to use it. It is labor intensive. I saw the best results when patients would leave it in an area for 4 seconds. Move about 1 inch in any direction and repeat. First from front to back and then from side to side. It took forever.
I've become aware of many lasers. Most from abroad. Now you can easily find knock offs of Knock offs. There is a "by prescription only" laser made right here in America. It is only available through providers. Their name is, coincidentally, LaserCap. It is the only one I know has studies behind it. I read that the array of 224 lasers provides for ultimate results. There is also a model 300 which drops down and covers the occipital area. This model would be ideal for any patient experiencing global thinning. These models carry a lifetime warranty which is unheard of.
As a side note, there are current studies on the use of PRP in combination with the use of a laser. Promising.
I agree with your assessment. The frame to your face is definite. That said, I would expect a lot more density. I have seen how your hair looks with Toppik and it looks amazing. Eugenix seems to be hitting it out of the park, so definitely worth looking into.