Well, no. The family in which you are born is effectively random. You don’t do anything to be born from your parents. Family ties have quite a lot of value, but material profit from them is not something you deserve as an individual, in the sense that it’s not something you get from your own efforts or qualities.
> Building something over generations, for example a company or a farm, becomes difficult with high inheritance tax.
That is the red herring we see when politicians want to manipulate the middle class into supporting something that is actually harmful to them. Inheritance tax is progressive like income tax. We can have a system that optimises for medium-size companies and businesses but limits the emergence of larger ones. When we talk about wealth accumulation that is harmful to society, we talk about tens of millions and up. Think multinational companies, not local farms.
Sure, the story of the family farm or company that gets built over generation is nice. But these kinds are threatened by larger competitors that have more leverage, power, political connections (and so public subsidies), and tools to undercut them, not inheritance tax. They would be much better without these huge mega-farms we incentivise and that are impoverishing them. Same for small businesses in a different setting. A family business needs to be quite big to be threatened by inheritance taxes. But it just have to exist to be threatened by the huge companies that insufficient wealth redistribution helps thriving.