C'mon, don't be that dense, it's is a metaphor explaining that people are more likely to accept change if done gradually as opposed to all at once.
unless they were lobotomised.
Look around. Think of the average person, half of the people are below that person's intelligence and a good number of them vote.
The only misunderstanding is that it is only a metaphor and not actually biologically correct for frogs in the literal sense. It is absolutely applicable in human behavior, observable, and easily replicated. Is coffee or alcohol an actual acquired taste or is it people gradually adapting to change?
https://behaviorfacts.com/boiling-frog-theory/
https://www.psychologytoday.com/us/blog/mindfulness-for-wellbeing/202201/whats-the-best-way-to-change