Newbie here with a quick question

So I mainly get movies and TV shows for free by just watching it on 345movie's website. I don't plan on downloading them or anything and never have. So do I need a VPN if I'm not downloading the media or is it still wise to use one? I use Proton on and want to watch stuff on my Oculus Quest 3, so I am curious. The most I get are weird pop up ads or sketchy ads, but I'm definitely curious.