No, if I'd viewed it like that I'd have had to find a husband in order to move out of the family home! I was never going to earn more than minimum wage.
My parents owned the house, I had my own bedroom, I was welcome to live there. Although I don't imagine they particularly wanted their DC still at home in their 30s, they wouldn't have turned me away.
I was wanting to leave by the time I reached 20 though. You can't live a truly independent life in the family home. Even if you are basically independent and get along with your family, there's still your parents viewpoint to consider and it's a generation away from your own. Never mind your differing personalities. It doesn't really work. Then there's sibling drama too. It's healthier and less restrictive to move out even if that's into a flat share. It's part of growing up and taking responsibility for yourself. I wouldn't have wanted to marry someone who hadn't taken that step, so felt I should do it also.
As an adult I know people who have boomerang children returning every time a relationship fails or to save for a deposit to buy. They've all allowed it but they're also all resentful to varying degrees and there's tension in the homes. Quite a few are planning to/have move/ed to a different area or downsizing, specifically to put off the boomerang children from returning next time! Essentially turfing them out without having to say so.
Going back to my past situation, I didn't want to be flat sharing in my 40s and 50s and I could see that was going to be my future if I stayed in London, unless I married someone with more earning potential.
Plus I couldn't even flat share without giving up my pet to afford it, prices had gone up in the years I lived with my ex. It's not as if I'd have been swapping pet ownership for a different lifestyle, the money would have gone on the rent and bills etc. I'd have had no spare cash at all. It wouldn't have been a good life really.
I didn't want to be trapped into a marriage in that way either. I didn't want to be viewing potential dates like that and having to exclude the low earners. If a marriage went wrong leaving would have been very difficult if there were DC involved.
I prized independence and freedom above everything. So I moved somewhere I could achieve that and have a relationship with someone based purely on whether or not I wanted to. I knew I'd made a mistake with my ex not long after moving in, but I stayed several years trying to make it work because of the hassle of uprooting myself to area if I was to leave. I didn't want to be in that situation again.