More practical to insulate and just paint your siding and roof white than replace your already existing/working AC. Immediate cooling benefits and no loan hanging over you for X years. Most people have not budgeted or saved for any infrastructure improvements though, so either is a hard sell.
No homeowner is going to replace a functioning system. No one is arguing for that. But furnaces and central ACs don't last forever, so when one of them goes, there's an opportunity for the homeowner to consider a more comfortable, efficient, safer, and healthier alternative (that is also better for the planet).
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More practical to insulate and just paint your siding and roof white than replace your already existing/working AC. Immediate cooling benefits and no loan hanging over you for X years. Most people have not budgeted or saved for any infrastructure improvements though, so either is a hard sell.
No homeowner is going to replace a functioning system. No one is arguing for that. But furnaces and central ACs don't last forever, so when one of them goes, there's an opportunity for the homeowner to consider a more comfortable, efficient, safer, and healthier alternative (that is also better for the planet).