Of course it's better to do the water changes. Your making a lot of assumptions. It's a 5g tank, water changes are probably the easiest think one can do.
Is it? Let's just agree to disagree.
IMO, it's not better to do daily water changes. Potentially messing with your water parameters and temperatures, on a daily basis, is more likely to cause problems, versus just leaving the tank be and letting its established bacteria and plants do their job.
These little guys are super tiny, very hardy, and their combined bioload is low. I'd be surprised if 10 Chilis managed to produce *any* detectable increases in ammonia, let alone levels so high, that you advocate daily water changes. After all, these are the world's smallest aquarium fish (not goldfish poop factories).
Lastly, this whole discussion is potentially moot. If the OP just buys the fish from a *reputable* LFS, just buy two or three, wait a few days, then go buy a few more, etc. If it's from a reputable LFS, I don't see any dangers with that.
Also, I'm not sure what "assumptions" I'm making. He posted in the Planted Nano Tanks forum. It's not an assumption to think his nano tank is planted.