Yes touch switches/smart switches are hard wired to your lighting and devices.
Actually they are just like normal switches having a relay which switches the light on off with a wired connection
Only when you use your phone to control the light, it uses your Wifi 2.4Ghz if your phone is also on 2.4Ghz.
Alexa/other assistants are also directly connected to your switches, hence voice assistant also works properly.
In this space a good premium solution in SmartNode.
If you want to turn lights on off. Then go for on off switches. Else go for Phase-cut dimmable solutions also in certain areas.
Dimmable lighting is a pleasure.
Even past few days i was looking for good wireless automation solutions. Leccy Genisis is nice and cheap but it's smartlife based. And they don't offer DALI Lighting control which i needed.
My purpose of smart lighting is Dimmable and Tunable lighting known as HCL (Human Centric lighting) which automatically replacates the Sun's color of 2700k-3000k-3500-gradually to 6000k at noon and back to 2700k by evening.
It helps our brains circadian rhythm .
Contacted Shelly Europe via email and a few indian brands too. After lots of emails, dealer prices, Catalogs, features i found SmartNode to be nice.
Can share the contact of an experienced person in their team who explained me everything and made my Quote.
Shall DM you