Yeah, if you want to electrocute some poor linesman outside.
If you have considered purchasing a generator for emergencies, get the transfer switch installed and be prepared so when you do it, you do it safely.
Obviously you shut off the main breaker so as not to backfeed. Didn't think anyone would be pedantic enough to make me say it. I wasn't writing out a tutorial.
Point being, there exists a purpose for the allegedly purposeless thing.