Everyone adapts budo to meet their own ideas. If they didn't, budo would never change and everyone would do budo exactly the same way.
But which ideas? That is the question. The first ideas you have when you step onto the mat, or the ideas that you develop over years and years of proper training? There is a big difference between saying "I think I will take up Aikido so I can learn the wrist locks" and something like "What if this feeling of extension from my back heel into uke's center is supposed to be in EVERYTHING?"
It is fundamentally impossible for everyone to do budo the same way - even if everybody is trying their hardest to engage in ignorant, mindless repetition.