Ajay, the situations are completely different in many ways.
In a commercial environment, they have specialised power circuits and a number of protection layers. In addition, if an amp goes bad, they just will not care. They will either get it replaced, or get insurance money. In addition, they will usually have redundancy built in, so even if one amp goes bad, they will have a spare one that they can hook up. In addition, in places like Canada, they do not have to worry about power fluctuations and issues like that. More important, they do not have the issues of heat at all.
For example, in Dubai, my son never switches off any of the equipment including PCs, amplifiers, modems, routers, TVs, etc. His house is air conditioned 24x7. If you need to reach the ideal conditions for an amplifier to be on 24x7 in India, be ready to shell out close to 10-15K a month in terms of air conditioning, power conditioning etc. Even when I use my A/c for 3 to 4 hours a day when I watch a movies or listen to music, my EB bill is close to 5K. If I need to keep it on all the time, it will certainly cross 10K.
In India, I would rather switch off and switch on when needed. If the amp takes 30 minutes to reach it's playable stage, then so be it. But, with, solid state devices, that is exactly what it is supposed to avoid.
Cheers