Ode-
You have been given limited individual experiences and seem to have drawn inaccurate conclusions based on them. While each of the people posting in this thread are being truthful as to "their" experience, their conclusions and your assumptions based on them are not necessarily accurate for
your situation or even as good general advice.
I am out on a limb here

.... but the wife already got her Rolex last year so why not... a freebie. LOL
You were seen by an orthodontist who has been treating you for the last few years. He has at a minimum, four years of college, four years of dental school, and then 2-3 years of postgraduate level specialty training in orthodontics. He has radiographs, study models, etc on your specific case as well as years of been there/done that experience on what will happen based on specific circumstances he's seen that are similar to your case. Also, important to note... your ortho will not take out the teeth himself as it would be illegal for him to do it, so he will pocket no money from this recommended course of treatment.
He has advised you they need to be taken out, yet you have decided that the information posted above should hold more credibility. Therefore, you will just "put it out of your mind" ???
Without having access to your specific information, I will speculate at some of the possibilities. One reason you may have been advised to get your wisdom teeth out by your orthodontist is a potential lack of space available in your mouth distal to your second molars. Most orthos would rather have the 3rds taken out before they erupt to prevent the potential shifting(crowding) of your existing teeth as they attempt to erupt and come into your plane of occlusion.
OR
Of course, there are other plausible reasons. He could have wanted them out due to the angle they are forming in your bone based on their radiographic appearance. Sometimes they erupt in an altered angle that can cause them to actually cause the resorption(eroding away) of the roots of the 2nd molars causing some obvious complications.
OR (
unlikely)
They could display signs of cystic development around the follicular sac that the teeth are forming within.
OR
The other problems with wisdom teeth are that even when they come in "straight", they often only erupt partially due to lack of space and end up as a trouble spot for decay,etc. Also, If the lower arch is crowded then they will usually erupt up against the anterior border of the Ramus of your mandible, and you will not be able to keep them clean with a toothbrush. Your gums will stay inflamed, possible allowing for recurrent localized perio abscesses and future decay of the distal side of the 2nd molar in that area.
OR
Another wonderful complication of crowded maxillary 3rds is the delightful buccal mucosa (cheek) biting that goes along with your upper 3rds being crowded and tending to erupt in a distal and buccal inclination.
Of course, these possible reasons above are only "made up" to justify the real diagnosis to your situation which is we all need to get your money to buy our wives another Rolex... after all, why NOT waste that four grand you ALREADY spent on braces to get your teeth straight. Let those puppies come in and maybe you will get to do ortho treatment all over again for another 4G's when everything shifts around.
When you smile in two years and look like sh@t warmed over, just tell that hottie in the bar next to you to quit staring. That you HAD already spent 4k on braces but that your buds told you not to worry about your wisdom teeth and that it would be alright and not to worry about it. Of course, you are FUBAR'd now, but she should know that the bastard dentist didn't get his 2nd rolex from the extractions so you really showed him who was boss. LOL