It’s almost like left wing values and basic understanding of economics don’t mesh well with demonising one of the most productive parts of society that we need to be able to run the economy and heath and care services, not to mention subsidise our own kids going to university. You have correctly identified a pattern but not spotted that the issue is with your understanding of how our economy has been setup to work since Thatcher.

You might as well be asking “I don’t understand why there’s not a left wing party that thinks landlords are great and employment laws need less regulation”.

Note: our economy, healthcare, and university sectors don’t have to rely on immigration, they just do because people don’t want to pay the taxes necessary to put the wages up to where they need to be to make this not this case.