When I had my house far away... I had an insurance that was increasing more and more, too much inflation and I had to take it off. As my workplace, computers and various items were there, I found it necessary but then the cost became so high that it was impossible to pay for it with my income. The same thing happened to my brother who had a computer business.
Here it is included in the rent and the owner of the flat pays it but I heard from my friend that it has also gone up, for the same reasons that you mentioned here... it gets complicated.
Insurance for your personal possessions are covered by someone else's insurance? Sounds risky.
No, mine, not the flat's, which was there before I came in, I have my own insurance on my belongings.