I don't think that anybody thinks that the points you raised are crazy or stupid ..... I felt they were being questioned to gain further knowledge. I for one was interested in what upgrades would be deemed necessary to make the jointer suitable for a modern commercial environment. Whilst the OP may not be using it in a commercial environment it is still interesting information to know as even in a home environment "Duty of Care" is just as important. Whilst not all the upgrades could/would be implemented for a home environment it is still handy to know what is considered to be a higher risk element.

Did your Worksafe inspector comment on the cutter head by any chance? Mine was used in a school environment and I was under the impression it was replaced due to the lambchop guard and possibly the cutter head but based on your comments it may have been more issues.