If something screws up they dont want to be sued. If you use open source you can't sue someone if it breaks...but if I use Oracle I can get support and in extreme case sue for damages.
That's not true. Most proprietary software licenses have the "not suitable for purpose" warranty clause that basically means that you can't sue them if their database crashes on you. Oh, and you can get support for free software from many different companies (SUSE and RedHat being two).
Most open source licenses include a liability disclaimer. Many jurisdictions, OTOH, have laws which limit the effect of liability disclaimers, so whether the disclaimer means anything, and if so what it means, varies based on which jurisdictions law applies to the liability at issue.