Because he claims that water entering the hose turns into piss, that's why

LN plays with millisats.. not btc
when your pissing in the hose. you have to realise there is a filter at the ends of the hose to stop the piss getting into the pool.
piss and pool water dont mix.
the filters being the 'settlement contracts' . the piss being the millisat payment. the pool water being the btc
the pool is a different shape store of water then what a hose is. they hold the data differently and move the fluid differently
the hose is not created to only fit the btc pool. its not a btc hose. its just a universal hose thats not made specifically for the pool.
infact the hose manufacturer has forced the btc pool to design a filter(tx format) to fit the universal hose.
but hey if you want to pretend that a hose is a pool and people can swim in a hose as free as they can a pool.. you keep playing that delusion.. there is a liquidity and flow rate issue with the hose that does not offer the same flow as a pool
but yea if you cant tell the difference between a pool and a hose. then anything IT related must be extremely hard for you to understand