Regarding the strictness of Passover, and everything that is strict is severe!

Here I am confused, why isn’t there a custom among Achabi to flush toilets?
Apparently, the law of feces is the law of leaven, as long as it is suitable for a dog to eat, it is not considered to be impermissible for consumption, and is considered leaven in its essence, and is it not known that dogs habitually eat feces (as stated in the Gemara 200), and therefore the law of feces is the law of leaven. And Tza
And don’t we usually boil the feces in the toilet, and when it’s cold, it doesn’t get swallowed? It should be postponed because it is boiled, like blood, and sometimes we forget to flush the water, and the feces stays there for more than 24 hours, and it is fermented.
And from all that has been said, it seems to me that it is absolutely obligatory to wash the toilet, and anyone who refrains from doing so is judged as a complete Epicurus who mocks the words of our holy sages, and who is a wine connoisseur and does not join the minyan.