It's personal preference. I'm a very smart tech person but like privacy and hate smart watches. But, they are handy and really life-changing for some.

I keep most of my notifications off, but I hate my phone making sound and I'm not a fan of having to take it out of my pocket to check stuff.
With a smart watch I can just get a gentle vibration on my wrist when I get a text or something, and often tap it to send a reply.
It's also a pedometer and if I'm walking I can use it to get pedestrian navigation directions without having to pull my phone out.

It’s 100% because you’re not a smart phone person. They are worthless without a smart phone. I like mine because I can use it to check 2fa codes on my Authenticator app without needing to pull up my phone. Which I’m usually on my laptop or desktop when I need them so it is a measure more convenient than pulling out my phone.

I oddly have notifications pop up on the screen, but almost always have my sound/ringer off, lest it get loud at work, or while my kid is trying to sleep. I can’t do dumb tvs, since streaming is required (I mean anything not connected to like an Apple TV, or chrome cast or whatever). And my phone vibrating from a call isn’t loud enough for my wife calling it to be heard, but the ping will sound regardless of whether or not it’s on silent.