Its not just growth to monetization, its next stage of 20% profit growth year after year, in this case in the end, sooner or later, one way or another, companies end up having to do bad things. So most companies end up doing bad things and society has to live with largely bad companies.
I wish there was a better way.
I am not sure how you are thinking of building it. I am thinking you would need a server hosted somewhere that can send a doorbell or video to your phone? It needs security, server to phone push ... it gets complicated.
These days a lot of utilities have 3 components - hardware, software and backend hosting e.g. Ring door bell - you need all three to be able to DIY it. So DIY options are so complex that only highly motivated technical folks can do it. There need to be open source glue (OSG?) to make it simple, only then we can hope to reduce enshittification.
They removed \don't be evil\ from their code of conduct, so it is ok now. /s