I'm wondering when applying for LL insurance if this was a requirement?
Not the whole replacement, but it was the cheapest option.
If they have bought on a buy-to-let, they aren't going to be bothered by keeping the house in it's original state, they have bought to make money.
My SIL bought a listed cottage, to let out temporarily, she had to make many adjustments to get insurance, but spent out, because the plan was for it to be her home, which it is now.
Her shit of a husband tried to remove the stone carved fire surround (to sell behind her back, now ex), he broke it in the process.
She found out that these had been carved by someone very famous, commissioned as part of Lord Derbys estate, given by Henry 8th and would be worth more than the cottage.
Some people have no appreciation of craftsmenship or history.
Film companies will pay to use original houses, even just the outside.