Your lack of humanity does you a disservice. Or maybe that's how you want to be perceived.
I've been at pains throughout my responses to state this is not whether I think it's a decent policy.
I am describing how it could be a workable policy and act as a deterrent, given some are suggesting "it won't work"
If HMG want to stop immigration to the UK via the dangerous route of the channel and interrupt the human trafficking business element (which are not unreasonable ambitions) those people who are leaving France have to believe that they will be immediately sent to Rwanda and have no chance of melting into the general population so they don't risk it.
Their alternative needs to be seen as creating a new life on the other side of the channel so they can normalise their application to live in the UK in the future.
Regarding your comment about lack of humanity.
FWIW I led a charity which worked with people seeking asylum and refugees from 2002-2009 and helped establish a local response in Stockton to the national 'dispersal programme' as it was rolled out by the then Labour Government.
In fact I actually won a national award from the Office of the Deputy Prime Minister for my work in Community Cohesion back then as we were one of the very few organisations to create a programme with the host communities to explain what was happening and why to create the conditions where there was less tension - this also included working with the established Pakistani community who were incredibly concerned about it.
Indeed, some of this highlights of my time there was attending Citizenship Ceremonies with people who I'd supported from arrival as they considered me family and I'm still in touch with 3 or 4 of them and have a brilliant friendship with one man in particular.
My experience of working with literally thousands of people seeking asylum, from all over Africa, South America and the Middle East, and having tens of thousands of conversations with them about the why's and wherefore's of why the UK and their process to get here is what is informing the answers I'm giving about how this policy could be workable.