I agree with you completely but the person I responded to initially was complaining that crafting "happens on Teamcraft" and that's not the case and has never been the case. You don't need to use Teamcraft if you don't want to. You have never, at any point of crafting in this game, needed to use Teamcraft to be a crafter if you didn't want to.
You have never "needed" to sit down and do calculations or whatever if you didn't want to, you could still figure out a rotation through experimentation and learning how the abilities interacted. I have never used macros and I'm terrible at math but I learned a rotation in Heavensward and then Stormblood through experimentation. It was not the easy route but it was fun for me because I didn't want to just copy someone else's rotation or use a simulator. I hated Rath's rotation and refused to use it, so I made it work. Was it "as good" as Rath's? Maybe not, but I made tons of HQ starred items by the time the expansion ended.
But now, crafting is so simplified that I think very few people should be at a point where they can't make heads or tails of it without the help of a simulator.
If you prefer to use the simulator or use someone else's rotations that is perfectly fine. But if you just don't like the idea of doing that, well, then great! You don't have to, and it's foolish to pretend like crafting is so broken that you "need" an outside website after the changes. It may not be as easy, you'll probably have to invest some gil, but if you just really don't want to use a website or outside tool, then put in the effort and figure out a rotation.
I think people are misunderstanding what I am saying. The changes were very good, but don't complain that you need to use a website to enjoy crafting, because you don't, and never needed to.
Also, even if you do use the simulator, you should know how your abilities interact and what does what anyways even if you use a macro, if you intend on being a very serious crafter.