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Home Assistant 2023.9: New climate entity dialogs, lots of tile features, and template sensors from the UI!
(www.home-assistant.io)
Home Assistant is open source home automation that puts local control and privacy first. Powered by a worldwide community of tinkerers and DIY enthusiasts. Perfect to run on a Raspberry Pi or a local server. Available for free at home-assistant.io
You do need to know the number, IF you want to maximize the amount of cooling via open window vs AC.
That aside I'm pretty sure this is an "agree to disagree" situation, mostly because it's clear we have different tastes. A smart home for me has the value of letting me control everything in a single place (always on me), without going around looking for remotes that might need a new battery. Automations are good, but I want to keep control over every little detail.