I speak of technical context, the only one that matters for creating a timechain entry.

Also, miners get tx'snout of band all the time, you cannot prevent that and long term incentives will only increase private mempool usage. MARA's slipstream offers whatbstarted at TG DM's as a service with a UI.

If spammers pay the fee, spammers get in the block. This is economic reality. Policy or configuration changes won't change this incentive. It's called censorship resistance.