Comparing us to noah is false since his people were comm itting shirk ( idolatry or polytheism).
This deen is built on following the prophet PBUH, if everyone speak to god on in their own their would be no need to send a prophet and following the prophet's teaching is not being in a cult,
﴿۞ يَا أَيُّهَا الَّذِينَ آمَنُوا أَطِيعُوا اللَّهَ وَأَطِيعُوا الرَّسُولَ وَلَا تُبْطِلُوا أَعْمَالَكُمْ﴾
[ محمد: 33]
This deen is built on following the prophet PBUH, if everyone speak to god on in their own their would be no need to send a prophet and following the prophet's teaching is not being in a cult,
﴿۞ يَا أَيُّهَا الَّذِينَ آمَنُوا أَطِيعُوا اللَّهَ وَأَطِيعُوا الرَّسُولَ وَلَا تُبْطِلُوا أَعْمَالَكُمْ﴾
[ محمد: 33]