The same people who find this film moving and powerful...
...probably wouldn't give a guy like Daniel Blake 10 minutes of their time if listening to him tell his story in a cafe.
The problem is best observed by the arthouse cinema crowd from the comfortable distance of a £10 seat in a cinema screen, where you can debate how "broken" the system is over a nice beer or coffee afterwards, and how "terrible" it is for a lot of people. Certainly not from actually having to talk to one of these people, connect with them, listen to them, be in a position where you might have to offer empathy or feel a pressure of offering financial support.
Your heart might bleed for someone like Daniel Blake, but if you saw someone on benefits buying Tesco economy essentials and clearly struggling financially, would you offer the same cinema ticket price to help them out and offer the kindness of a stranger, to buy something they could actually enjoy? I doubt it. I once offered to pay for the shopping of such a person in Tesco, as a one-off random thing, and they cried tears of joy.
You don't need to offer a long term solution, to still be able to help. Even just listening, or empathising, and not making someone feel invisible goes such a long way.
The bureaucracy of the welfare system, which does actually help a lot of people, is a red herring and distraction when compared to the much bigger problem of how disconnected, uncaring and unable to empathise, most of society has become. Declining self-worth becomes a vicious circle, and can become a huge barrier to even feeling worthy of employment or human connection.