I can't tell if you mean it that way, but that sounds like a good thing.
The point _you responded to_ is saying that silicon valley investment favors youth because they can get better ROI by working younger folks harder and extracting better terms. They're saying older folks are harder to do that to, and you're saying "that sounds good" without specifying who you think it's good for.
It's good _for entrepreneurs_ to have more work life balance, not get burned out, and capture more return for their hard work. It's good _for investors_ to get max returns from their investments. There's a set of parameters to maximize returns for both parties.
You don't clarify what you mean by "a good thing."
To be fair to the grandfather comment, that was the point.
I'd like to paraphrase it. "The child comment was unclear so it doesn't appear to add value."