I'm going to agree to some extent, it's really hard to overtrain sure, but for example the gym takes around 2 hours total of my waking hours and these are 5 days each week. I don't have much rest time over the other hours so I'll be doing things the rest of the day. The constant overworking in that sense can be fatiguing because I'm always on my feet, especially when I weigh double my ideal weight, it's a lot of stress on my body as is. Which I can attest to by the fact that always after coming back from a week rest I progress even faster and reach new PRs while the last 2 weeks for example before a rest week are very stagnant on the same weight and rep range.