Sorry, but I think that there is a point being made here in what seems to be off-topic chatter. The film is old and there is a very finite supply. The process is tricky and needs to be babied.
Therefore, you have here the pitfalls in a nutshell.
Everyone owning 120 film and wanting it processed may only amount to a few runs, and the results may be less than perfect. And, you will have to practice with 35mm film to get things up and running right.
That about sums it up. And I guess people are reluctant to commit to anything.