True. "Nothing prevents Blizzard". However, that is a meaningless argument to have, considering that "nothing prevents Blizzard" from closing down all their games tomorrow. Just like "nothing prevents Blizzard" from doubling the subscription fee, removing WoW tokens, making the Death Knight class into cloth-wearing spell-caster and rename them 'Necromancers'. On top of that, "nothing prevents Blizzard" from deleting Vanilla forever, and all new characters then start at level 60 in Outland, and Kalimdor and Eastern Kingdoms are no more.
Because "nothing prevents Blizzard". See how meaningless that line of argumentation is?
So now you're a programmer at Blizzard and know how Blizzard develops their software?compared to other options it would be a lot less work.
Because old raids are exactly that: old. They're obsolete. If Blizzard hasn't done what you propose yet, it's likely that they believe that fine-tuning every single legacy raid to be just as challenging at their respective levels as they were when those raids were relevant is too much work for little reward. Because every class change would have to be done with those legacy raids in mind, making the process more complicated than it should be.There is nothing hard about doing raids at level 60 right now. You can walk into BWL in level 60 quest gear with 19 friends, half what "should" be required, and have zero problems whatsoever. There is no challenge. Yes, you're right that you can technically do it.