Is lifting 2 days a week really better than 4, 5 or even 6 days

no, but 3 is arguably better.

Middle school and high school athletes train 5-7 days a week and do just fine

You're using over training as an excuse to be a lazy piece of shit

Honestly depends on the volume done each day and what is being done?

You can make SS a 6 day split if you are stupid enough

>>42432107
As long as you hit the same muscles 2/3 times a week you're golden. That said: I'm doing 6 times a week. Hitting everything 2 times a week. I've never experienced faster/better results (strength gains, overall muscle gains and definition) and it's much easier to stay motivated. Try it for 6 months and compare. Maybe your body can't handle the load, maybe it can.