Much like the conspiracy that pharma companies are uninterested in curing diseases, the complaints aren't based on data or facts.
I'll offer cystic fibrosis as an example. Trikafta may as well be a miracle drug. And CRISPR-based gene editing and replacements are being researched that could be an outright cure, as opposed to a 90% cure.
The problem is these treatments on the bleeding edge of biological understanding are going to start out expensive.
That puts most Western governments with limited budgets in a pickle, having promised their citizens modern medicine equitably at affordable cost, tax or otherwise.