Not at all. The biggest lights I have ever run was 2x400 HPS, which isn't even a 4 amp load. Currently I am only pulling 600w through 4x150 QBs. I use a mixture of Sonoff, Smart Life and TP Link switches, it is wise not to put all your eggs in one basket. They are all rated at 10 amps maximum, which is 2400 watts.
The only time I have had the lights fail to come on is when there was a global outage of the Sonoff (aka EwElink) network, but Sonoff have manual and LAN override, so it was no drama. I have a TP Link switch controlling the fans and that failed to operate once due to a bad configuration on my part. I control all of my stuff with Google Assistant as their routines are very reliable, I have at least one Google smart speaker or display in every room in the house.
If they fail to run I get a notification on my phone so I can quickly manually override from anywhere in the world, as long as I have a internet connection. The only caveat there is with running smart switches is you must have a reliable internet connection.