HI OP,
I think you have mistaken the generic capsule wardrobe spiel for an actual working wardrobe for you.
If I worked outdoors, I would have a Barbour or other brand quality jacket, skinny jeans (no need to buy expensive) and great boots by Dubarry or Hunter or Timberland or one of the other good country brands.
That is your work go-to wardrobe.
Then your workout wardrobe (which I call my school-run wardrobe, as I workout straight after) is great leggings, great sweatshirts and a good waterproof running jacket (or a throw on lightweight parka that you can get from Decathlon or Uniqlo).
Then your other wardrobe, which is for dress up occasions - you really should only spend in proportion to the amount of time you will use these. So, if you will only wear once per year, do not pass £50 of spend, if you will wear it weekly, then invest.
Decide whether you want dresses or trousers. I have 2 pairs of wide-leg trousers which I wear with a leather jacket (12 years old now) and trainers and a silky top. If I need to dress up further, I wear a black boucle jacket and heeled boots. I would say I have done this once in 12 months, most places now are more informal and so I never need to ditch the trainers.
I also have 3 midi dresses from Zara which I wear with a denim or leather jacket and trainers.
Finally, I invest every 4-5 years in a dress which works for all occasions and is now a pleated midi dress (8 years ago it was a shift dress).
I don't think anyone, except people who look to Audrey Hepburn as their style icon, needs or uses a LBD anymore (and I say this as someone who had one in my wardrobe as my evening staple for a decade).
I would also forget about a blazer - I bought one (expensive) three years ago and I have worn it three times!!!