We're saying the same thing, in different words. It's just that some novices may read this and think, "Great! This confirms that I should do more and more." I think you may have seen this many times.

Preach bro! I couldn't agree more!

try running your car for days non stop, yeah you'll end up burned too, body needs to recuperate, eventually your CNS will shut you down & you become vulnerable to injuries especially when not giving a day rest to your shoulder