because pruned nodes don't propagate blocks that they are missing pieces of the transaction payload
it's like saying to someone who wants to help keep bitcoin decentralized "you can only participate in block propagation if you obey our spam-permitting rules"
no spam. git r done and run more lightning nodes. speculative fiat money asset use of bitcoin is a poison pill to pollute bitcoin with fiat incentives. we want to kill the dollar and visa and mastercard, not become part of the shitcoin casino and stock market casino fraud.