Is this a joke I don't understand? Aren't Android apps sandboxed? How does these two commands supposed to make my phone fast for 50 years?

rm -rf ~/.cache/* 2>/dev/null

rm -rf /data/data/com.termux/files/usr/tmp/* 2>/dev/null

Source: https://github.com/50YearsPhone/vision-50-years-phone/blob/m...