Different people have different agendas. I have none on climate change, but do think eliminating our dependence on certain countries for our hydrocarbons would be a good thing.
There are native birds which have seen population numbers crash as they beat based on length of day, as historically that was an accurate measure of when their food (in this case caterpillars) are at peak supply.
The warming that we've seen had meant that the caterpillars (who use temperature as to when they start) have been hatching earlier in the year.
This means that the chicks have been starving to death due to lack of food.
However it's also likely to mean that the caterpillars are doing much better as there's fewer predictors out to eat them (as it's been happening for long enough that there's now fewer adult birds which also means fewer chicks).
Having increasing numbers of insects which eat plants is likely to mean that food production is harder, which means that the cost of food increases.
These sorts of unintended consequences are difficult to predict and can cause issues we don't expect.
You've just introduced a specific. Burning hydrocarbons isn't the only way we used them. For example, they're used to make paint, plastic, pesticide and detergents to name but a few.
If we restrict it to burning, what are the proposed alternatives for reliable electricity generation, aviation, domestic and commercial heating etc,?
A lot of energy is used for heating that's true, however it's entirely possible to significantly reduce that need by better insulation. In doing that we'd also reduce the need for quite so much electricity generation.
However heating isn't just about us, but other countries too. It's why some have developed a basic solar water heater which is aimed at providing hot water to the global South.
As this the removes the need for those areas to burn fuel to heat water. It's much cheaper than systems designed for the UK, as it doesn't need to allow for our freezing temperatures or be anywhere near as efficient as there's much more hot sunshine.
Likewise there's many ways of storing electricity produced using renewables; and given that renewables are currently cheaper than most other sources we can afford to have some energy losses in storing energy in other forms before converting back to electricity for the grid.
Aviation is the harder one to overcome, however given that fairly few people who fly a lot create a lot of the emissions from flying it shouldn't be too hard to have some reduction (or at least more limited increases) in the number of flights taken without causing too much upset.
Green hydrogen would likely be useful for aviation, however the big issue with hydrogen is that we should have a plan which activity reduces the emissions from the current useages before we start to need to use more of it (even if that's, say, for every 100 tonnes of new Green hydrogen, at least 5 tonnes of existing hydrogen use is to be made by green hydrogen).
Otherwise we run the risk of there being more brown hydrogen created to keep up with demand, which would make things worse.
Currently the worst thing financially to do is carry on as before, even ignoring any possible future negative events.
As to personal transport I would rather much more travel was by walking, cycling and public transport, even though my job is designing roads. Why you may ask, well because it's not possible to build our way out of congestion and every time we try it just creates more congestion.
Personally I think that for the vast majority of things that we do it'll probably be that we'll hardly notice the change.
For instance we currently use about 10% less electricity than we did a decade ago, a few complain but generally we've got more electrical devices than ever before.
Likewise, about 1/3 of our electricity comes from renewables and less than 5% from coal, a decade ago that was almost the reverse. Again it's had little impact on our ability to do what we want.
Now the next steps will likely have more of an impact, however no one is suggesting that were live without any electricity, live within walking distance of everything and only eat what we can grow locally.
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