You miss the point. Spacetime has 4 Dimensions. All 4 are warped (the impact on time is not an assumption). 'Models' of the universe that assume 4 Dimensions explain reality to an extreme degree.There are no 4 spatial dimensions. This is an idea that I also had a while ago, but this is not the case. There are 3 vector dimensions. And then there is a time or density scalar.
Nothing I have suggested conflicts with the facts so far as I can determine (although I am about to change my opinion on some aspects of time). However, it is important to recognise what science has established so far - but if we wish to challenge whole concepts we need to produce a good argument with the evidence.
Assertion on its own is not too useful.