I'm the guy who wrote the long post on the possible routes.
I do not agree with you.

If i'm have to see 50-60 urti a day everyday for the rest of my life, i think i will go nuts.

The key to is find meaning in your work i guess. In those first few years after m.med many a times i want to quit to go private GP land, go community hospital , turn locum etc.

Now i'm still here in the polyclinic. I'm do not have FCFP and not doing some head or deputy job.
Can't say I'm loving it every day, there are good and bad days , but overall i'm not hating it. I try to engage myself in various things.
The key as one of my senior advised me, is to find your niche. She ended up doing the education track.
Right now i'm clinical 3.5 days ,0.5 days teaching and 1 day doing a unique external arrangement that is clinically quite light. Involved in SAG work and a few collaborations with hospitals as well at MOH level.

The 3.5 clinical days can be varied. I am able to run the special clinics like health and mind, memory clinic, dermatology STC, procedure etc It gives me some depth and makes the work interesting.
I saw 48 patients today in a mix chronic acute urti que. I finish at 1pm , break for lunch and start work at 2pm and finish work at exactly 4:30pm. Most are routine cases but there is a guy who had Hba1c 8.9 that i managed to get him to start on metformin after he had declined for 2 years. It took some time and counselling. End the end of it he told me he is agreeable to start because i take the time and have the patience to explain many things to him unlike all the other doctors before me.
I like to think i probably give a few more years of good life.
We are a production line only when u allow yourself to be a production worker going through the motion la.
I can also tell u many other satisfying cases i've seen but i shall not bore you here.

I also do not see patient everyday unlike a private GP. Wonca coming, someone help me pay the fees and i get to spend 2 days away from work for example. I think i shall try to do some research to present at the next wonca which is not in Singapore! so i can take paid conference leave and bring my wife for a holiday

I also teach a fair bit although i'm letting the younger m.medders take more now. Year 3 NUS students, year 4 electives, year 5 saps in addition to residents and APNs. I have a whole fridge of thank you cards from students.

I don't earn a lot la. Not surgeon money, but not faring too badly. Annual handily beat most hired GPs i think and i work 8-4:30 pm hor.