I don't think we realise nowadays how horribly precarious the lives of JA's girls were. You didn't have a roof over your head or anything for lunch unless you married.
Society said Men Support Women, period.
No discussion. You couldn't work - you didn't need a job as your loving DF, DH or DS would be paying your bills. End of.
JA was the one to point out that sometimes that wasn't the end of it. Most of her novels are about women who aren't being provided for by their families and need to marry, but don't want to be booted into sharing a bed with a weirdo for life.
JA's own life is a cracking example of this - her parents were a properly silly couple who had loads too many children they couldn't really afford.
The youngest boys were sent off to join the Navy at age 11 or something. The youngest girls - Jane and Cassandra - were kept at home till they were 17 and 15, until JA's DF gave his house and business away to the eldest DS and decided to go travelling.
JA and CA had 0 money to start with, no way of getting any, and now no roof over their head. This lasted till just before JA died.
DF died suddenly, leaving his DD exactly 0 and no pension for the wife. Having no dowry, JA was dumped by her equally skint boyfriend who married an insurance heiress.
All her adult life JA 'travelled' between increasingly grim B&Bs and rich relations' houses. Rich relations would have them 'to stay'in exchange for domestic duties.
JA was royally shat on by her family and society, and she died very young, which may have been as a result. She was outraged at the lack of generosity from her next of kin, let alone basic decency. In all her novels she makes the point that people who you should be able to rely on, you simply can't, and that decency is what you want to look for in a DH. And that decency is learnt, not given to anyone because they are in a position of importance.