Because producing immunity has a specific biological meaning.
Warm blankets might have some efficacy in preventing someone from catching a cold. However that does not make them vaccines because it does not prevent immunity.
Look, if you want to discuss these things and you really are not being dishonest (although I find that not very plausible) you need to do a lot better about thinking things through before talking about them.
There is nothing wrong with suggesting people get warm blankets or ivermectin or whatever else if there is evidence that it might help mitigate an illness. What one should not do is claim its a vaccine when its not.
er another typo: “does not prevent immunity” should be “does not produce immunity”.
AndyTheBear wrote: “Because producing immunity has a specific biological meaning.”
Please provide your definition of ‘immunity’.