no, i don't think every software is bug free.

but if i spend money on an engine like gamestudio i expect to have some advantages over free solutions. that conitec does some of the work for me (for example provide user friendly tools). that i don't have to take care of every detail myself and waste a lot of time with workarounds for things that don't work properly.

for many users this isn't the case anymore with gamestudio.