I'm a grown-up (marginally) & I rent for a number of reasons. I sold a property two years ago overseas (hadn't lived there for five years though) & was happy in my rented house at the time.
Subsequently have moved from that rented house to another one where we're also very happy. I love the flexibility of renting, I like the fact I have options in my life, the fact I could move to another country at the drop of a hat without a major headache.
I like the fact I don't have to worry about my roof or my boiler. I actually quite enjoy moving & living in different houses.
I keep my eye on the market but haven't seen anything I'm mad about & won't buy until I will.
Anyway - most people don't own their houses - the bank does, & even if you've paid of your mortgage - you'll die one day - the house will still be there. The last house I rented was 700 years old, we were all just passing through.
Plus - the money I save on my mortgage I invest elsewhere, so swings & roundabouts there really.
Finally DH & I are in the process of starting a new business - I like the fact it's not dependent upon where we live, if we need to relocate or downsize - we can.
Enough reasons OP?
FWIW it's a five bed-roomed farmhouse & costs 1200 a month so we fit your 'you're a fuckwit' criteria quite well.