Is 3rd party AV still needed?

Hi guys! I have a question. I have been using Norton antivirus for several years now. I like to visit sketchy sites from time to time to watch movies. Also, I have downloaded some APK apps to my Google Pixel, and when connecting with public wifi, I want to use a VPN. Soon there will be time to renew my Norton 360 (for 80eur). Recently I have read from the internet that third-party AV is not necessary anymore (and everyone seems to hate especially Norton AV). My question is should I cancel my subscription and why? Also I looked up some VPN prices and they do not seem so cheap. I would not want to cancel my whole package and pay the same for my VPN. Thanks for your answer!