@Chosen_One.
TJ was talking about "HIS" mods not Fallout 3 mods total. Most of his mods are Fallout 3 conversions to work with TTW.
Now in general.
"Most" Fallout 3 mods will work with TTW but all require conversion so that they have the proper masters to function properly or at all. Some mods require more conversion than others, and the level of conversion can also vary. That being said many of the "big" mods are currently being worked on by someone to make it work "PROPERLY" with TTW. Martigens Mutant mod comes to mind. There are also quite a few mods that the original author has made for TTW (Nevada Skies is one).
If anyone says "Do it yourself" it's not a bad thing, it's a learning thing. Does this mean they're unwilling? No unless you come across as rude or entitled. There are a lot of requested mods on the site and everyone has limited time and most have their own projects that are being worked on. (Have you looked at PANZER) BUT I have never seen or been apart of a community that so many are willing to help even if the question has been asked 50 million times before especially if the person asking has tried to help themselves first and not just ask for help because they don't want to be bothered searching the forums for an answer. Biggest thing to remember in modding. Modders mod for themselves first, we're just lucky that many are willing to share what they made with the world. IF they were not we wouldn't be on this site because it wouldn't exist.