Clearly “choice” is a sliding scale here that’s based on prevailing social norms. The US has double percentage of single parent, households compared to Germany, https://www.pewresearch.org/fact-tank/2019/12/12/u-s-childre..., almost five times the rate compared to India, and almost eight times the rate of China.
You speak as if single parent households are that way by choice. I'd wager 99.99% wish they had a stable partner helping them out.