The OP and everyone that agrees with him are wrong. OP is also doing the same thing wrong that practically everyone complaining about colonists gets wrong. Don't micro them. Instead, specialize and micro the DOMES.
While I hate to admit it, he's right. The game doesn't care if you're making sure your colonists are happy and healthy. If anything, it punishes you for it.
Same thing with production. You should have a dome that is thumbs up botanists with farms, thumbs down engineers and scientists (leave medic, security, and unspecialized neutral, you need some not a lot). Build a science dome that is thumbs up science thumbs down engineers and botanists. A university dome that is thumbs up unspecialize, thumbs down specialized. And so on.
If you have your colonists happy and comfortable, this is absolutely impossible. Once comfort in a dome is over a certain threshold relative to the amount required for population growth, you no longer have the ability to "specialize" that dome or any other in the entire colony for a simple reason.
I once did a test and made a mod giving me Service Robots and all tech to see what would happen if I brought about 30 Founders to Mars to live in a perfectly prepared dome. The result? First Martianborn within about two hours. Take note, that's 30-32 people in a Mega dome set up to have them as happy and productive as possible, something that you can probably do fairly easily late game. If you have a dome set up to tend to every colonist's needs and put them over about 90 Comfort, it will cause a massive explosion in births that quickly put the dome over capacity, causing people to leave for other domes and free up space for more births. I tried doing the specialization idea once and found out that people who went to the university dome couldn't move out once they graduated. The only way to make use of this is to deliberately quarantine every dome and cut off the water, oxygen, and power supply to kill off the entire dome so a few scientists/botanists/engineers/etc can make use of the degree you made a dome for them to study at.
See above. Happy colonists produce more, but they also reproduce much faster and prevent you from specializing unless you put a university in every dome, taking up space that could be used for a factory, a farm, or a research center. In the long run, the productivity gain isn't worth it unless you use Biorobots, but when you use them you give up the ability to have any say over the new colonist's specialization.And you do need to keep them somewhat happy. Happy colonists produce more.
The fact is, this is a game that's shown extreme flaws in a system that should be interesting by making it seem like not caring should punish you when giving more than the basics punishes you in the long run... And that's before you look at the fact that many other parts work so counter to what you'd expect (cloning vats don't clone the colonists working in them, or even in the dome for that matter, like the wiki and common sense says, for instance) and a lot of it is misunderstood because there's little to no information ingame.
This game is not a paradox game, seems that there has been some major misconception among some people.
When a company chooses to publish a game, they're putting their name and reputation behind it. Any game Paradox publishes has some of the same expectations tied to it since it draws in Paradox's fanbase... Which means that a game that doesn't live up to those expectations can still hurt Paradox itself.