Absolutely, 100% no. 😂
If you want to upgrade because your phone is a toy, and you want the latest toy, go ahead. As for “reasons” to do so, there really isn’t one.
For me, a phone is a tool used for entertainment, and for work. Your 11 is equally as capable as a 12 unless you’re doing incredibly niche work on your phone (running Monte Carlo particle simulations....?), you have a strong passion for iPhone photography and want access to ProRAW, or you want to change to a bigger or smaller phone (to a 12 Mini or Pro Max).
Personally, I have a 2 year old XR. I’ll replace it next year simply because I can afford it, and because I think I’m going to switch to a Mini. Otherwise, I wouldn’t bother. My XR does everything I need, which is the regular casual browsing, to running the Office 365 suite and attending the occasional Teams/Zoom meeting. No games, and I almost never stream videos unless watching 2 minute NBA highlights. 🤷🏻♂️