It’s because it’s not true, there’s no evidence for it that passes the sniff test. No lab is “shipping a worse model once they’ve got you”. People have a bad few days and blame the model providers instead of stepping back to fix their workflow.
When it comes to something with random results (unfortunately that's what LLMs are), people will think the odds are rigged against them.
It's a good thing that hype-chasers are cancelling though. So we can use the services with a reasonable latency.