Fair question! So, I don't have a "feed" as I have all of YouTube's tracking either switched off or blocked via NextDNS and I try to only use it signed out. The rare occasions that I have to use YouTube, the right hand sidebar is regularly filled with completely insane stuff. Though sometimes it's just filled with thumbnails of people pulling stupid faces while pointing at something.
It doesn't take much. We recently had large floods where I live and I decided that for next time I was going to have some supplies ready, just in case. A few seemingly benign searches for "preparedness" later and my feed is full of conspiracy theorists, guns and Jeeps. I guess the "prepper" crowd correlates strongly with some other categories.
He didn't go out of his way, he literally just explained that he searched for something and got served the crackpot stuff. Searching for something on YouTube isn't going "out of your way", it's using it as intended. Maybe read it again.