Overall risk tolerance is statistically associated with age. If that's not something you believe, then we're not going to see eye to eye. But in my opinion, if the OP asks if something "is a good idea" in respect to age, and there's a relevant age-correlated reason why it might not be a good idea, then I'm perfectly on-topic for bringing it up. While someone may understand their own risk tolerance, they don't necessarily understand the riskiness of the situation they are jumping into...which might be why they asked the question in the first place. So again, there's no reason I can't mention it. And your premise that my comment is so "obvious" that it shouldn't be permitted to be spoken, is simply ridiculous.
It sounds like I hit your trigger phrase, and your response is likely far more about you, then about me.
And I'll reinforce any message I please, thank you very much. I don't need "people on message boards" dictating what opinions I am or am not allowed to hold.
If you're 40 with a high standard of living, and mouths to feed, and a mortgage and car payment etc, then startup life might be rough on you, and outside of your risk profile.
But if you're prepared to live the lifestyle of any other startup founder (at least during the first few months), and assume the same risks as everyone else, then I don't see why age would be a disadvantage at all.