Yes but it's nice to have extra functionality.
I use the wireless Hue dimmer switches, the batteries last a long time. I have one on my coffee table... it's nice to dim lights for multiple lamps from the couch, or adjust the colour temperature. My wall switches have no dimming dial, nor do my lamps. I can't go back to non-dimmable lamps.
It's just a different type of consumer luxury or hobby, unnecessary but also fun and rewarding.
I do hardware modifications and small electrical upgrades / changes myself, it's cheaper and I find it enjoyable and rewarding. Most recently I fit a dimmer to a high velocity ducted workshop fan, so now it has full variable speed control, as it's quite powerful and all the CFM isn't always required or desirable.