A node literally cannot fill up faster just because there is other data in it. There is a maximum limit to the rate of blockchain growth and it would have happened if blocks were full of monetary transactions as well. At the end of the day, a transaction is a transaction whether the sender and receiver perceive it as money or not.
Like I said, there is no good argument for running knots. It is a psyop that used Bitcoin's own strongest narratives against itself.
