No, I'm with you. I worked full-time for 18 years and it IS exhausting. I also hated having to concentrate on the same thing every day. I literally couldn't handle it, it contributed to my breakdown. I thought I "should" and thought I would enjoy a fulfilling job so I gained a really great role on a really great career ladder but ended up fucking it up royally because the autonomy meant I didn't concentrate.
I realised it just wasn't for me. I was studying a professional post-grad degree too and really high aspirations, but I did not enjoy it so I packed it all in.
I decided I wasn't going to be miserable. If I didn't enjoy how I spent a third of my time I did not consider that living.
I was single so I had freedom, and I'm so glad I came to the realisation before I had a family and real responsibilities because I packed up and moved to a new city that was very cheap and went to an employment agency and started a job on 10K less than previous, but I had MORE money due to the cost of living where I had moved to from London.
I do that same job now freelance and love it, also the earning potential goes up and up and I've had two payrises, the last one double the first, and had an in to other work within the company and area, which is just fantastic.
I don't want to be a professional. I don't want to have a full-time job. I want variety and to be able to be here for my child whenever she needs me, instead of having to leave work or being unable to leave work and feeling bad about that.
You should prioritise happiness. this idea of failure because you don't want to grind yourself into the ground, let go of it! Honestly because even those who will berate you for it will only think about you while they're berating you, then they will go back to their own lives. It simply does not matter what others think of your choices.
I'm very fortunate to have found work I genuinely enjoy and feel good about doing, but when I was at work before that I would fantasise about going and getting a bar job or a job in a cafe, chatting and joking with colleagues and customers, and having no job stress. I made budgets for it, even thought about benefits and just existing that way.