It's only less secure if there's something easy to break close enough to the door that a person could break it, reach through, and unlock the door. That's only

It's only less secure if there's something easy to break close enough to the door that a person could break it, reach through, and unlock the door. That's only really relevant if there are no windows anywhere else at ground level that a burglar could easily break and climb through. Interestingly, the door locks commonly used in the US are much less secure in general than those typically seen in Europe. The average US household deadbolt can be opened with fast lockpicking techniques (raking, zipping) while European ones usually can't. That may be a surprise given the relatively high crime rate of the US. One crime that isn't as high in the US as most European countries, however is burglary of an occupied residence. It seems the increased risk to the burglar's life may have some deterrent effect.