It seems that it's just my opinion, but I don't believe that users should have the freedom to choose what is defined as Bitcoin. They have the freedom to experiment with it, to use it, to create new things on top of it, but not to change it. Satoshi chose these consensus rules and every person who refuses to accept them is free to follow a different chain.
Satoshi chose 1MB as the block size limit but look, it is obviously not feasible if we need to scale up. If you only consider the original consensus rules to be valid, then you would probably not be using the Bitcoin that you have today. Satoshi did lay the groundwork but it is obvious that not all of the choices that he made has actually made any sense at all.
As for Satoshi: It's not the fact that a "guy" decided what rules should be followed. That doesn't sound good. It's just the way the chain started. Every consensus change would be against the philosophy.
Would it have made sense to be following the original Bitcoin with no block limits, an overflow bug, no segwit, no p2sh, etc? It was obvious that Satoshi didn't mean to leave Bitcoin as it is, there is a set of rules which probably won't garner any support or would redefine Bitcoin but it doesn't mean you can't improve Bitcoin.