That said, we can't stop ordinals because we'd have to censor the network, make it more centralized. Ultimately people decide what they want bitcoin to be and if the majority wants to upload their stuff to the network, that's what's going to happen.
Satoshi didn't invent Bitcoin to see what it turns into in the future and say "what the heck, it turned into a cloud storage that died afterwards". We also didn't adopt bitcoin thinking it can turn into a shitcoin by letting people who don't even run full nodes themselves upload garbage to other people's computers!
The bitcoin we're using now is not exactly the same bitcoin that it was in 2009. First there was no block limit, then 1MB, now it's up to 4 with an additional minimum size limit. I'm a maximalist at heart, but I'm not a purist. We do have consensus after all and bitcoin can be upgraded and updated.
As for full nodes, do they change anything when it comes to uploading? If We had a requirement that they have to run a node to upload garbage, you'd still be against it.
What if some knowledge starts being censored and by uploading it to the blockchain people will still be able to distribute it, the way you can get manuals on how to 3d print weapons and mix chemicals to get drugs and explosives. I know that the answer to this is "but what if they upload child porn or doxxed data, but then we're going into "what is freedom" debate.
The problem of ordinals is so difficult because your freedom ends when it begins to threaten others and make their lives more difficult. If you upload useful data, it's fine, but if you upload something that makes the network sluggish and bloats it so that others have to buy more and more storage, they are not going to applaud you for it.