It's all in the client.

There's not 1 Nostr, it's a protocol like the English language.

Imagine deriving your opinion of English, just by listening to nostr:nprofile1qqsvktfat6k5ttdvjraszzhcqk9ya5ee3yfr7gmnk5qzq0c4ygz4j8qpr3mhxue69uhkummnw3ezucnfw33k76twv4ezuum0vd5kzmqpz3mhxue69uhhyetvv9ujumn0wd68ytnzvuq3samnwvaz7tmjv4kxz7fwwdhx7un59eek7cmfv9kq0lv9re.