What you learn as a PPL student is not particularly sophisticated stuff. A low hours instructor, if he or she is good at what they do, is quite sufficient for basic training IMHO.
There are other aspects that are way more important than mere experience, such as being able to follow a syllabus, being able to teach the students just what they need to know, neither more nor less, and teaching according to current best practices as opposed to how it was done back in the 60's.
The idea that one is necessarily a poor instructor just because one has less than 500 hours, or because one aspires to do something else after what one is currently doing, is as offensive as it is erroneous.