But it's possible theoretically. That's why I am certain if you as a "original" Thai citizen enter on "wrong" passport it is different and the "farang becoming thai" restrictions will not apply
My point is theoretical. But it could happen..That's why I am certain if you are dual citizen but your original citizenship was thai and you enter Thailand on the wrong passport. They cannot hold you accountable if you did something wrong in the immigration process with your other "identity"
You don't understand the fact theoretically you can lose your "other" citizenship. So there wouldn't be any switching passports anymore. Only the Thai passport would remain