Why bots which can't read a ladder can play rated games?

[gennan]

Proposal: Bot games are not rated

Also, deliberately exploiting a bug to play the same game against a bot multiple times is cheating and will get you kicked, this is very different to just knowing the bot has a general weakness, which you’ll find most players have if you play the same one often enough

I wonder how one can distinguish between cases of
“deliberately exploiting a bug to play the same game against a bot multiple times”
versus
“just knowing the bot has a general weakness, which you’ll find most players have if you play the same one often enough”.