Home Automation is just a hobby like "productivity" tools or going all in your coffee setup. You tell yourself you are saving energy, or freeing up your mind from remembering mundane tasks but in reality it's just like a model train set.

It's fun to set up, play around and maintain it for some people. If you'd do the math of setting up hundreds of dollars worth of smart appliances, bulbs, hubs and thermostats to tweak your heaters slightly while you are not at home...it will probably take decades to break even, if at all.