World ocean temperatures in 2021 were the hottest ever recorded

We should start by working to keep the ocean clean, then worry about the temperature of the polluted water.

Why is there more interest in controlling the temperature vs the pollution itself?

consumerism needs to change for temperature to change

No(even though i fit in your description aswell), I used to think that way about many issues of the world(of which by the way climate change is not really that impactful towards the individual against kids, compared to economic issues, political,etc) until i was ~22, then i quickly realized that actually that's one argument in favor of having children.I'm not saying you cannot be selfish from having kids(just as much if not more from not having kids), i'm saying that pragmatically human life is the most efficient and important way to solve any problem.There are other more personal reasons(such as happiness, duty/fulfillment,etc) you should consider before putting priority on such issues.

This might be an unpopular opinion, yet i dare anyone to show me a point in history when having less kids was a good idea and showed better results than letting people do as they fit (because forcing people to have kids is not something i endorse, yet it sadly happened, and also is a bad idea: Look at China: more kids through a boom, then they forced people to 1-2 kids, which created a massive vacuum and nowadays China is facing not-so-bright future due to this fact , their middle class also increased massively, and we know that this results in less natality).

Sadly the socio-economic structure we have today(i'm not talking capitalism vs communism, they're both the same in this aspect) kind of forces us to have more kids but for the wrong reasons.We decay as a society when we view human life as a resource for work force for corporations or getting X/Y done, when in the past the booms of increasing populations(think post 89', or 18th century, 2500BC, roman era,etc) were mostly done because the prospects of the future were bright, thus leading adults to having more kids.

I think it is reasonable to not have kids if you think the probability of an acceptable quality of life for them is too low.

I only agreed to have kids because I have a spouse who earns above average and I feel secure that we will be able procure resources and equip the kids well, but I think would have been just as happy if I had not had kids.

Of much greater concern to me is the stability of my income potential in a world that's increasingly automated and career stability is gone.

I feel like my default is no children, and that will only change if and only if I reach a level of wealth that I can feel very comfortable committing to the ~18 years of directly raising a new human, the 4+ years thereafter for continuing education, and all the costs associated with raising a well experienced and skilled human so they can have a chance at generating their own wealth.

However, I also think inheritance is mostly a curse on people who receive it, so if I had children, I would raise them with the explicit expectation that I will pay for their education, but will likely have a hard cutoff of financial help after a certain milestone or age. And they can expect 0 inheritance.