There is money to be made in lifting things out of the gravity well. It's an obvious pile of cash to go after. Comparing the two is a bit disingenious.
If you actually had a solution in hand for even small scale fires that was effective and could scale you easily make this profitable. I'd be the first customer. I live in a fire prone area.
Fear sells.
So you're panacea of if they build it, they will come isn't as realistic as you are hoping.
Edit: Also, you'd better have one hell of a legal team to draft up some BS ToS to protect from when ultimately your firefighting efforts fail. One lost property, and your valuation drops to 0.
Our collective heart is in the right place. I have my own plans to do something about it but I am not in the same position as say Elon Musk for example. Not yet anyway ;)
I am in tech however. And I believe passionately that tech can solve this problem. Even if it is just a symptom of global climate change.
I think we must start solving these problems fast and with novel approaches. The same old tired routine isn't working. We've kicked the can enough down the road with government and fire prevention. New ideas and methods are needed and needed fast.
We've had very good idea of how houses burn for 30+ years and we keep designing things that are built to burn.