It’s a nuanced take, and has very much to do with this idea of “picking and choosing” which transactions get included in blocks based on how much you spend. RBF and SegWit work hand in hand in this regard, while not strictly depending on one another.
Outside of that, what you are ‘complaining’ about is what powers SPV.
The ability to validate one-way-reduced hashes of unique content - without the actual content - to trustlessly deliver + receive digital content that can be guaranteed to be authentic.
What ultimately stands the test of time is the timestamp hashing of the content as it branches + breathes life into the chain of transactions after it.
If ‘the people’ prefer an off-chain solution that only hashes timestamps, then maybe it will exist?
Look .. to your point .. can you tell me how you will feel about this string of curmudgeoned contrarianism many years from now? It’s all there, for ‘eternity’ (pruning notwithstanding).
Well, FWIW, the ‘app’ is like an implementation atop a data protocol, which belongs to you (er, your current-identity-linked on-chain paymail pseudonym), and within some technical reason (IP) any competitor could offer a similar service and ‘charge’ less.