Yes, which is fine. All I'm saying is that it's possible to foresee and plan for that, but then fate throws curveballs (in my case a pandemic and dying parent) that prevent those plans from coming to fruition.
And as a single person you have absolutely no safety net or access to help, regardless of how hard you've tried or what fate have thrown your way.
Also @mrsm43s - yes a single person may have more earning opportunities than a couple raising a child/children.
Many of us mid life singletons have already done that and we're not going to magically morph into high earning career women overnight when those kids fly the nest.
As for only one set of expenses, sure, on the daily that's true, but a kid at uni (even one with full loans that has worked since she was 16 and is good at managing her money) comes with costs...getting them kitted out for Halls in year one, additional bits and pieces for year 2 moving into a shared house, countless 200 mile round trips to and from on occasions where she needs to bring more stuff home or the trains are screwed, not to mention the lengthy holiday (which are lovely but it's still more expense) and having to help her with covering double rent as there's a crossover between Year 2 and 3 houses, trying to help her out by paying her car insurance and contact lens scheme every month...
Yes, it's my choice to do some of that...just like it's her father's choice to rarely put his hand in his pocket now he doesn't have to...but what decent parent wouldn't do that?