Solar module efficiency is what, about 20% at best? Thermal is more like 60%. This means less roof area needed on a house that doesn’t have a lot of solar exposure.
So anything above a CoP of 3 and you need less area. That’s pretty doable these days. Maybe read up on how heat pumps work first before making assertions.
Also you can totally store hot water from a heat pump.
The main disadvantage is cost and complexity.
And you think you are? Literally one of the most salty people I have met. You aren’t convincing anyone.