This is happening where I live and I see the same arguments on Facebook. "How can they tear down such a historic house?" But when it's pointed out that the house went up for sale and no one talked about buying it to preserve it, they all shut up quickly. Everyone's for preservation until someone asks you for money.
There was one tiny house by the beach that caused a lot of angst. This place was tiny - a 2-story ugly box that was maybe 1,100 sq.ft. It had 4 tiny 9 x 9 bedrooms on the 2nd floor and a single bathroom on the 1st floor. Fun! It reportedly had some old knob & tube wiring. Double fun! The new owners bought it for $2.2 Million and went for approval to tear it down. People asked the town to stop them. Yet, diagonally across the street, another, similar building was torn down and replaced with a modern beach house without a peep from anyone. The town knew they couldn't do anything about it so it got torn down. The mansion that's there now looks pretty good, better than the old house in my opinion.
Old isn't always better.