Ok so you want to make a better switch.
1. The problem starts with powering it. It would be a real dogs breakfast to have a cord coming out of the lightswitch going to a wall adapter so you need to find a teeny weeny power supply that can fit inside the wall plate.
2. Who's got 12 light switches in a row in their home?
3. Projects involving the mains are not suited for beginners or noobs, you would also run into local certifications so it wouldn't be easy to export as a kit. Transformer-less supplies also tend to run hot, plus their probably a bad idea when combined with a metal touchplate.
4. Efficiency, well a mechanical switch is pretty near 100% efficient, a touchswitch is not.
5. Light switch manufactures in Thailand must enjoy selling to an audience that busts their stuff. It's possible to make an unbreakable light switch by mere mortals, it would probably cost less than a hi tech solution. Cheap light switches here are less than $1 retail, wholesale must be pennies.
6. Such stuff already exists. And there are oodles of em.
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