Or a lack of faith in institutions to report the truth. As I said, no government, no council would commission any report that concluded immigration had a negative impact on housing. It's just not how there things work, unfortunately. But the evidence is there on the ground for all to see.
And that's not to say immigration is bad. It's about levels and it's about recognising pros and cons and coming to a balanced opinion. But ignoring the impact is 1984 kinda thinking.