I’m merely pointing out that one of you is going out of his way to be respectful. The other, not so much.
@Arun_Nayar have you confirmed that your switch boxes contain a neutral wire? If they don’t, you can still use Z-wave/Zigbee switches, but they’ll pretty much only work with incandescent bulbs.
This topic may be helpful. Note that JD was a constructive participant in this topic as well. 
Automated Switches: What should my wiring look like? (US Version)