I think it all depends on how one values and spends their money. And to be fair, there’s enough Birkins on the used market to clearly demonstrate that “1 Birkin for every 1-3 million US$” is far from reality....people are way over that ratio frequently
I think where this question starts getting interesting when you discuss value for money, which is very subjective. It’s not the Birkin that’s really the question to me...almost anyone can justify saving up for a top-end bag if it’s their goal and desire. Rather it’s the Evelyne, Garden Party, and such...
really basic bags that nobody would be willing to spend half what they cost from Hermès on if they were from other designers. I mean, yes, absolutely nice bags and beautifully made (no shade intended), but is a GP really going to give you $1500+ more value in both use and style over the LV Neverfull? Probably not. And both can be taken in for repairs, so that argument is moot.
Overall this is where it lands for me: is one “too poor” to add a selection of Hermès items to their closet over the years, along with other brands they enjoy? Likely not, but you can easily break the bank if you let yourself get caught-up in “needing to have that brand on you at all times to keep a status.”