I frankly think this reasoning is faulty and leads to some really messed-up thinking. For one, value given does not have to equal value received. We are all always trying to increase our circumstances, and every choice made voluntarily is done so in anticipation of increased net utility to us. You should not therefore expect tips to be an exact representation of the value they perceive in units of money.

Another issue is that value is subjective, and not everyone even has, needs, wants, can afford to spend, etc., bitcoin.

Still another issue is that a positive-value tip is not some thing to be expected every single time someone appreciates a service they receive. What the heck guarantees a person to receive voluntary tips? Even if the prospective tipper has received something they value, what reason do we have to expect that they will always pay an amount of money at all? Further, what would be the utility of such a norm should it become enforced by the notion that one's lack of tipping constitutes a lack of enjoyment? Would not people limit their exposure to things for fear of needing to tip everything they found useful, and the sheer mental tax of figuring out how much?

I'm sorry, but this statement is dogmatic and asinine in the face of praxeology, practicality, and its restrictive implications on a person sensitive to the feelings of others.