You could probably make that up by driving less, since a typical passenger vehicle emits about 4.6 metric tons of carbon dioxide per year. If you look at the UK, it's estimated that 20% of the nation's emissions are directly from heating and hot water, which is analogous to many areas of the US. This is largely due to old and poorly insulated housing stock.

This isn't meant to be CO2 whataboutism, but rather to compare meaningful individual contributions to emissions. IMO aviation for most international travelers may be a large single contribution, but they do it infrequently and other activities could be moderated of modified to make up ground. I mention this to support my parent claim that aviation has numerous benefits, and they may likely outweigh their costs accounting for externalities. That said, I would advocate a carbon tax that prices emissions into things like gas, heating, flying, etc.

However, there are tons of economies that rely on tourism to function. There is no clear way to make up for that in the short to medium term. It's generally agreed that economies need to decarbonize energy production ASAP, and that takes money which has to come from somewhere. For many economies less air travel directly means a diminished ability to decarbonize energy.

Now let's turn our focus to the nations that originate the travel in question. These places generate a lot of economic activity from travel as well. Now laid off employees of Boeing do not pay income taxes, and use public money in the from of unemployment services. If they were still employed their taxes could go to any number fo climate initiatives, their pay checks could purchase more efficient vehicles, and they could retrofit their homes.

Diminished economic activity doesn't position any nation to take active measures towards climate change mitigation.

It doesn't surprise me that the HN crowd lacks the empathy to see the damage being done here, but say for instance someone told you couldn't code anymore, you lose your job, and you might have to pivot into another industry at a time when nobody's hiring and you don't even have the skills or training to get in the door. Then some pompous asshole online says "well ackchually this is good for the environment because computers consume energy and don't run off of the hot air I blow everytime I open my mouth"