Hear me out. I know this is going to be tad bit long but I assure you this is thought provoking. ( I mean I still have a hard time convincing myself if this doubt is even well founded)
Firstly we don't know the most fundamental shape of all and consequently the dimension for existence. Now I say this because firstly a circle although a shape, is mathematically defined as a polygon of infinite sides, right?
Secondly, now when you want to construct a line in a single dimension, what you do is that you take a point in 2 dimensions of infinitesimal size and glue a bunch of points together, in order to amount to a given length( note that here when the size although infinitesimal is fixed one tends to replicate those sizes and then actually make it amount to that length), but when we see that the solid circle that we are calling our point here can't really be though of as the most fundamental shape, then we can actually see that this infinitesimal point of the smallest length comprehensible still can be called as an infinite sided polygon and therefore we can never really define the point of any dimension rather we would be stuck in cycles, and we can never really define a point because for that we would need some line segment and basically we can't define even an infinitesimal point, right?
PS: I am still very much confused if at all this thought is well founded, and if it is, what might this imply.