Older homes with just renovated bathrooms should be the ideal purchase, as someone has done all the hard work. But unfortunately people selling houses also often choose the cheapest option or worse they choose to do it themselves.
Having looked at over a thousand inspections in Adelaide, I can honestly say you probably do not know what you are buying if you have not chosen a creditable building and pest inspector.
These photos are from a house I inspected a few years ago, it was a nice looking renovated house, the walls were freshly painted, a new modern kitchen installed and the living areas opened up, after having some internal walls removed. The bathrooms were also freshly renovated and it all looked beautiful. Looking closer however, the bathroom renovation was not adequately waterproofed, with moisture passing through the floors and into the adjoining walls. Wall patching could be seen during the inspection and the moisture meter was showing moisture transfer through both walls of the bathroom, old brick walls and the new gyprock walls. Other areas of concern for this dwelling, resulted in the purchaser not bidding for this dwelling and purchasing elsewhere.
The point of a house inspection is not to scare you from purchasing a property, but to give accurate advice, so you can choose what level of issues you are comfortable with.
Most houses, even newly built ones, have issues that can be resolved, some under warranty, others by negotiation with the vendor.
All houses have issues that can be repaired to a better standard, as long as you know about them when purchasing. If you have allocated a budget for these repairs within your spending limitations, you are thinking about your house purchase wisely.