I feel like this is somehow germane to the Poverty Escape Velocity thread in that the only difference between a lot of poor people and your siblings is the amount of money they bring in via income. Neither have any accumulated resources to buffer or remedy unforeseen events, but your siblings could if they chose to, and their day-to-day is generally a middle class lifestyle.
Why would they be angry at you? Because you didn’t stop them, or because you’re not willing to just fork over all that cash you went without (relative to them) in order to accumulate? Either way, that’s a supremely assholish attitude for them to have.