Why do people say living with your friends/best friends isn’t a great idea?

‘Best friend’/friends often doesn’t mean you can live harmoniously. Usually involves clashing lifestyle preferences, people falling short of their personal responsibility and commitments, The expectation that your friend should always be forgiving of these shortcomings, and having disagreements about money that implode friendships.

Because you'd inevitably get into fights and that would ruin your friendship.

Once you cross that line of personal space. They change

Money changes everything.

Simple as that.

Society define it pretty loosely.
Currency is the controller everywhere and when friends start staying together her without having a mutual base, differences are bound to occur.
Hence, most do Not try even if they know that TRY is a Saviour word.

More often than not moving in with good friends causes many problems. It happened to me when I was 18 I moved in with my best friend since we were 12. We never spoke much again after that horrible year together.
There are many reasons that it tends not to work.
People are only trying to let you know of the risks.