Bitcoin has a limited amount of transactions which can be committed to the base layer, and needs to remain limited in order to remain decentralised. In order to stop anybody potentially shoving anything down the 'limited pipe', Bitcoin makes a trade-off with transaction fees. Transactions with higher fees are less likely to be spam (Bloat), but transactions with lower fees are more likely to be spam. But spam / bloat can be subjective and in many cases there aren’t clear indicators of what is bloat, and what isn't.
You can see how ridiculous your argument is when you compare to another limited pipe analogy, "road rules on a highway":
With motor vehicle traffic, motor vehicles are forced down a 'limited pipe'. Now in order for this system to work, the state makes a trade-off and says that there are 'road rules'. Drivers must stick to the left lane unless overtaking, not exceed the speed limit, not drive under 20% lower than the speed limit unless there are unsafe conditions or other traffic inhibitions, etc, etc.
'A payed tx is not bloat' for the Bitcoin blockchain would therefore be like the road rules simply being 'a moving car is a legally driving car'. You could have 90 year old skeletons driving 10KM/S in the fast lane for the 90KM/S zone, Nutbars driving 250KM/S in the wrong lane, some 12 year old driving a Hilux in reverse, etc, etc. Half of them could be stoned, and the other half drunk.
