Exactly, if you had the previous versions... And in that case it was only 4 versions to download (2,3,4,5).
It is still annoying, but in games where there are more builds than simply 4, it would not be flexible.
As Holy Bacchus said, a few devs have done patch updates (Glassix, BaDIK, City of Broken Dreamers etc.).
Generally they offer both a full download and patches though, so new users can start with the full download.
Sorry but unless you are paying IMO you don't have a say, possible supporters are not supporting nothing. Money talks and bullshit walks.
They do it for their paying customers, not pirates - the aforementioned Dr PinkCake hates pirates.
They mostly seem to offer patches where the file size of their game is quite large, which is a barrier for some of their customers (Glassix 5.25 GB, BaDIK 8.2GB, CoBD 4.7GB).
One apparent issue with patches around here at least is that many users are clueless about how to apply them (despite packaged instructions), so there are numerous posts about the game being broken, how to patch etc.