Disagree entirely with your post... Babysitting was an extreme expression, however you still need to stick to a group of allies to survive usually (with good backup, especially pikes, you're a real killing machine). Of course you can win 1 vs 3 or even more if you're playing against bad players. However, an agility build can run away, kite, change tactics or quickly change position when needed, which a strenght build can't without imediate backup (if enemies are close ofc). Not to mention, with an edge of athletics, you will catch up with players trying to run away.
Also, you're toast versus a group of semi- good players if you're alone, and since the average skill seems to be increasing in general, getting zerged is usually not a very clever tactic...
That doesn't make strenght builds worse by any margin, it has it's upsides as well of course. It's just a somewhat different playstyle imo. I personally think that really skilled players do better with at least 5 athletics.