I thought of another case that might be pertinent. Some of our New Jersey friends might remember this incident from perhaps the early 90's.
There was a mall show in North Jersey one year, several displays were located on the floor. Well on Friday evening, as a mall movie theater let out, a fist fight broke out amongst patrons leaving the show, It was a really knock down, drag them around fist fight. A couple of floor displays were damaged and one was essentially completely destroyed. Long story short, owner made some exorbitant claims regarding some of their large Phalaenopsis that were ripped to shreds, crushed and rendered useless. Some individual claims on plants were well over $2,000. I have no idea what the total claim was in terms of dollars but they lost the case. Why?
Because it was hard to prove the true worth of 'run of the mill Phalaenopsis'. Was $2,000+ really an accurate assessment or was there a good deal of sentimental value attached? I have no idea. I am sure that the Mall's insurance paid something for the loss of the plants but it was no where near the $20,000++ that they were seeking originally.
Yes, expert witnesses, other commercial vendors, long time orchid growers were called. What is the old adage? Oh yeah, "you can't make a silk purse out of a sow's ear"!!!!
But getting insurance to cover the cost of one's poor culture will be prohibitively expensive in my opinion. You would essentially be asking some company to pay you for your mistakes in being a terrible grower. You want money to pay for your own mistakes culture wise. Does that make any sense?? I doubt that that would ever happen. If you are paying incredible premiums and then are saddled with a high deductible, making an insurance claim could be financial suicide.
Better just become a better grower and stay away from plants that you can not provide the conditions for.
You bought it, you killed it, why should insurance cover that? Disasters such as fire and theft, your homeowners policy or renter's insurance might cover catastrophic loss but individual plants, doubtful.